Practice Programming Problems (1391)

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1 Party With Trees H ... ... Medium-Hard, Trees
2 Tree and Coprime Queries H ... ... Data Structures, Hard, Trees, Prime Factorization, Algorithms
3 Sonya and sticks H ... ... Dynamic Programming, Algorithms, Medium-Hard
4 Largest Windmill H ... ... Medium, Algorithms
5 Little Shino And Equation H ... ... Math, Easy-Medium
6 Happy and Sets H ... ... Combinatorics, Easy, Math
7 Destroy the machine H ... ... Very-Easy
8 Save the Kidney H ... ... Dynamic Programming, Medium
9 Circuit breaks Long into segm... H ... ... Hard
10 AISH AND XOR H ... ... Easy-Medium
11 TnP Thanksgiving Party H ... ... Very-Easy
12 Sherlock and Highways H ... ... Medium-Hard
13 Sherlock and Travelling H ... ... Medium
14 Sherlock and Subarrays H ... ... Medium-Hard
15 Molly And Flame H ... ... Easy
16 Sherlock and Robots H ... ... Medium
17 Easy Question H ... ... Very-Easy
18 Valentine Time <3 H ... ... Very-Easy
19 Presidential Problem H ... ... Very-Easy
20 Prof. H.Pole and his Strict ... H ... ... Very-Easy
21 Matrix sum H ... ... Binary Search, Algorithms, approved, Easy-Medium
22 Innocent Swaps and His Emotions H ... ... Combinatorics, Modular exponentiation, approved, Math, Easy-Medium
23 Divisor Queries. H ... ... Data Structures, Number Theory, Easy-Medium, Math
24 Lexical Sorting Reloaded H ... ... Sorting, approved, Easy
25 Collecting Apples H ... ... Dynamic Programming, Easy-Medium, approved
26 Random Words H ... ... Sorting, Implementation, Easy, approved
27 Fibonacci substrings 2 H ... ... Dynamic Programming, Combinatorics, Algorithms, Medium-Hard, Fibonacci numbers
28 Space smugglers H ... ... Dijkstra, Medium, Algorithms, Shortest-path
29 Family competition H ... ... Segment Trees, Sorting, Fenwick Tree, Medium, Algorithms, Dynamic Programming
30 Gadget fan H ... ... Combinatorics, Easy-Medium, Math
31 Dorsplen H ... ... Algorithms, Easy
32 Exploring ruins H ... ... Algorithms, Greedy, Very-Easy
33 Employee Complaints Management H ... ... approved, Medium-Hard
34 Appropriate Partitioning H ... ... Implementation, Bitmask, Brute Force, Medium-Hard
35 Prove us Wrong! H ... ... Medium
36 Hector & Safe house H ... ... Easy-Medium, Easy
37 Area of Union of Rectangles H ... ... Easy
38 We love pirates! H ... ... Easy
39 "MONTY MONTY MONTY" H ... ... Easy
40 Spidey Mania Strikes Again H ... ... Easy-Medium
41 Love Triangle H ... ... Very-Easy
42 Skyler & Marie's Shoplifting H ... ... Easy
43 Monk and Palindromes H ... ... Medium, Disjoint Set
44 Friends And Foes H ... ... Disjoint Set, Easy-Medium
45 Marriage Problem H ... ... Disjoint Set, Easy-Medium
46 Teacher's Dilemma H ... ... Disjoint Set, approved, Easy
47 Count Friends H ... ... Disjoint Set, approved, Easy
48 Transaction H ... ... Segment Trees, Merge Sort, Data Structures, Medium-Hard, Binary Search
49 Convoluted Operations H ... ... Data Structures, Fenwick Tree, Compression, Easy-Medium
50 Share Market H ... ... Bitmask, Dynamic Programming, Algorithms, Medium-Hard
51 Little Shino and Pairs H ... ... Data Structures, Stack, Easy
52 Micro's House H ... ... Trie, Medium, Data Structures
53 Good String H ... ... Implementation, Ad-Hoc, Easy, Basic Programming
54 MINION TROUBLE H ... ... Medium
55 Killjee And Sequence H ... ... Very-Easy, Medium-Hard, Medium-Hard
56 Nimxor and Bit-Strings H ... ... Easy-Medium, Easy-Medium
57 Mogu Loves Numbers H ... ... Easy
58 Katari and his love for Mex H ... ... Prime Factorization, Very-Easy, Very-Easy
59 Naughty Vineeth H ... ... Implementation, String Algorithms, Very-Easy, Very-Easy
60 Bishu and his Girlfriend H ... ... Very-Easy, Very-Easy
61 Can you Guess ? H ... ... Very-Easy, Very-Easy
62 Bishu and Soldiers H ... ... Binary Search, Brute Force, Very-Easy, Very-Easy
63 Monica and Gaming Obsession H ... ... Easy-Medium, Easy, Easy
64 Games With Shiva! H ... ... mathematics, Medium-Hard, Medium-Hard
65 Dangal with Shiva! H ... ... Mathematics, Easy, Easy
66 Benny and Sum H ... ... Hard, Algorithms, Sqrt-Decomposition
67 Benny and String H ... ... Segment Trees, Medium-Hard, Data Structures, Medium-Hard
68 Benny and Some Magic H ... ... Medium, Algorithms, DFS, Medium
69 Benny and Candies H ... ... Algorithms, Easy-Medium, Greedy, Easy-Medium
70 Benny and GCD H ... ... Easy, Math, Easy
71 Ash and Obstacles H ... ... Implementation, Sorting, Easy, Easy
72 Batman and Tick-tack-toe H ... ... Implementation, Basic Programming, Ad-Hoc, Very-Easy
73 Boring Question H ... ... Very-Easy, Easy, Number Theory, Easy
74 Jarvis and Numbers H ... ... Very-Easy, Very-Easy
75 Jarvis and Seven Segments H ... ... Ad-Hoc, ad-hoc, Very-Easy, Very-Easy
76 Monk and String Search H ... ... Set, Medium, Binary Search, String Algorithms, Hashing, Medium
77 Monk and Number Query H ... ... Hashing, Easy-Medium, Trees, Easy-Medium
78 The Monk and Prateek H ... ... Implementation, Hashing, Easy-Medium, Easy-Medium
79 Little Jhool and the matchmaker H ... ... Ad-Hoc, Hashing, Easy-Medium, Easy-Medium
80 The Monk and Kundan H ... ... Ad-Hoc, Easy, Hashing, Easy
81 Employee Details H ... ... Easy
82 Jarvis and Lone Integer H ... ... Basic Programming, Bitwise-xor, Easy, Easy
83 Saul Goodman's Problem Statement H ... ... Easy-Medium, Easy-Medium
84 Walter White's Special Compounds H ... ... Medium, Math, Number Theory, Medium
85 Harry Potter and the Deathly ... H ... ... Medium-Hard, Medium-Hard
86 Harry Potter and the Order of... H ... ... Medium-Hard, Medium
87 New Game H ... ... Very-Easy
88 Harry Potter and the Prisoner... H ... ... Easy-Medium, Easy-Medium
89 New Friends H ... ... Easy-Medium
90 Subsequences H ... ... Medium
91 String Queries H ... ... Data Structures, String Algorithms, approved, Easy-Medium
92 Overplay Your Hand H ... ... Medium
93 Cool numbers H ... ... Implementation, approved, Math, Easy-Medium
94 Fibonacci Numbers H ... ... Easy
95 Harry Potter and the Sorcerer... H ... ... BFS, Dijkstra, Easy, Easy
96 Mystery H ... ... Very-Easy, Number Theory, Very-Easy
97 SubString Divide H ... ... Implementation, Simple-math, Medium
98 Simple Function H ... ... Implementation, Math, Probability, approved, Easy
99 Colourful Toys H ... ... Greedy, Dynamic Programming, Math, Easy-Medium
100 Not So Simple Function H ... ... Binary Search, Data Structures, Medium-Hard
101 Candy Distribution H ... ... Math, Medium
102 One-Sized Game H ... ... Sorting, approved, Simulation, Easy-Medium
103 You get your Christmas gift! H ... ... Medium-Hard
104 Closest Gift H ... ... Very-Easy
105 Help Santa H ... ... Easy-Medium
106 Little Monk and Flip Operations H ... ... Bit manipulation, Graph Theory, Algorithms, DFS, Easy-Medium
107 Monk and Xor Tree H ... ... Graph Theory, Algorithms, DFS, Trees, Easy
108 Little Monk and Edge Count H ... ... Graph Theory, Algorithms, DFS, Easy-Medium
109 Monk and Graph Problem H ... ... Graph Theory, Algorithms, DFS, Easy
110 Monk Learning Graph H ... ... Graph Theory, Algorithms, Easy
111 Elves and Dwarves on War H ... ... Medium
112 New Queries H ... ... Easy-Medium
113 Monk and BST H ... ... Data Structures, Trees, Easy-Medium
114 Little Monk and Swaps H ... ... Data Structures, Binary Search Tree, Easy-Medium
115 Monk and Tree Counting H ... ... Data Structures, Easy-Medium
116 Monk and Cursed Tree H ... ... Data Structures, Binary Search Tree, Easy-Medium
117 Monk watching fight H ... ... Data Structures, Binary Search Tree, Easy
118 Christmas queries H ... ... String Algorithms, Algorithms, Hard
119 Christmas tree H ... ... Algorithms, DFS, Medium-Hard
120 Christmas digits H ... ... Dynamic Programming, Algorithms, Medium
121 Christmas string H ... ... Easy-Medium
122 Play with Ranges! H ... ... Easy-Medium
123 Little Shino and Unique Students H ... ... Easy
124 Fredo and Interview Data H ... ... Easy-Medium
125 Counting stars H ... ... Combinatorics, approved, Math, Easy-Medium
126 Long ATM Queue H ... ... Data Structures, Greedy, approved, Easy
127 Vanya and Students 3rd time a... H ... ... Easy, math
128 Micro and Messages H ... ... Very-Easy
129 Monk Celebrating Checkpoint H ... ... Data Structures, Stack, approved, Medium
130 Monk and Number H ... ... approved, Math, Medium
131 Little Monk and Balanced Pare... H ... ... Data Structures, approved, Stack, Easy-Medium
132 Monk and New Array H ... ... Binary Search, Sorting, approved, Easy
133 Monk and Operations H ... ... Data Structures, approved, Easy
134 Monk and Lucky Minimum H ... ... Data Structures, approved, Easy
135 Permutation Intersections H ... ... Inclusion Exclusion, Dynamic Programming, approved, Medium-Hard
136 Jumping Tokens H ... ... ad hoc, approved, Medium
137 Grid Scramble H ... ... approved, Math, Medium
138 Triangle Game H ... ... Geometry, approved, Game Theory, Easy-Medium
139 GCD Strings H ... ... Recursion, Math, Easy
140 Longest Non-Decreasing Subarray H ... ... Data Structures, Dynamic Programming, Easy
141 Eat Or Not? H ... ... Data Structures, Easy
142 Write a checker ! H ... ... Data Structures, approved, Easy-Medium
143 Odd Even Pairs H ... ... Math, Easy
144 Monk and Fredo H ... ... Medium, Math, Medium
145 Monk and Divisible Numbers H ... ... Prime Factorization, approved, Modular exponentiation, Easy-Medium
146 Monk and Students H ... ... approved, Number Theory, Easy-Medium
147 Monk and Divisor Conundrum H ... ... Math, Easy
148 Monk and Square Root H ... ... approved, Math, Easy
149 Rhezo and his array H ... ... Data Structures, Hard
150 Good Subarrays H ... ... Data Structures, Medium-Hard
151 Rhezo and his birthday gift H ... ... Algorithms, Medium
152 Mojo, Jojo and Game H ... ... Algorithms, Easy-Medium
153 Rhezo and character frequency H ... ... Basic Programming, Easy
154 Digit Problem H ... ... Basic Programming, Very-Easy
155 The Close-i-ness H ... ... Easy
156 Study- Flyover H ... ... Easy-Medium
157 ML Test Practice H ... ... Very-Easy
158 Strange Creatures H ... ... Medium, Medium
159 Magical Word H ... ... Easy-Medium
160 The Demonetization Dilemma H ... ... Dynamic Programming, Algorithms, Medium, Medium
161 Zeus and Fibonacci H ... ... Segment Trees, Data Structures, Matrix Exponentiation, Hard
162 Utkarsh and Tiresome RMQ H ... ... Algorithms, Sqrt-Decomposition, Hard
163 GCD on a tree H ... ... Inclusion Exclusion, Math, DFS, Mobius Function, Medium
164 Factor Trees H ... ... Recursion, Dynamic Programming, Sieve, Math, Medium
165 Mike and Fraud H ... ... Math, Easy-Medium
166 Mike and GCD Issues H ... ... Ad-Hoc, gcd, Math, Easy
167 Fredo is in a Hurry H ... ... Ad-Hoc, Basic Programming, Easy
168 This is Code Apocalypse !!! H ... ... Medium-Hard
169 What's wrong with this CYPHER... H ... ... Dijkstra, Medium-Hard
170 String Fight H ... ... Easy-Medium
171 Rubik's Square H ... ... Easy-Medium
172 Simple Game H ... ... Sorting, Data Structures, Algorithms, Binary Search, approved, Easy-Medium
173 Sort me this way ! H ... ... Ad-Hoc, Data Structures, Sorting, Algorithms, approved, Easy
174 A Nightmare Quiz H ... ... Sieve, Math, Number Theory, Easy-Medium
175 Number game H ... ... hiring, approved, Data Structures, Easy-Medium
176 Maximum Rating H ... ... Easy
177 Little Shino and Elo Ratings H ... ... Medium
178 Min-Max H ... ... Basic Programming, Very-Easy
179 Sagar's Gift H ... ... Easy
180 Playful String H ... ... Easy
181 Maximum Chocolate H ... ... Easy-Medium
182 KillCode's Wish H ... ... Easy
183 Vanya and Students yet again !! H ... ... Very-Easy
184 Boring Game H ... ... Easy
185 War Begins H ... ... Easy-Medium
186 Monk and Order of Phoenix H ... ... Binary Search, Data Structures, Stacks, Medium
187 Little Monk and Goblet of Fire H ... ... Queue, Data Structures, approved, Easy-Medium
188 Monk and Prisoner of Azkaban H ... ... Data Structures, Stack, Easy
189 Monk and Chamber of Secrets H ... ... Queue, Data Structures, approved, recruit, Easy
190 Monk and Philosopher's Stone H ... ... Data Structures, Stack, approved, recruit, Easy
191 Addition ain't simple H ... ... Very-Easy
192 Micro and Assignment H ... ... Very-Easy
193 Sagar's Learning H ... ... Easy
194 Mr. Gora's Number H ... ... Medium-Hard
195 Deadpool Set H ... ... Easy-Medium
196 Palindrome Codiyapa H ... ... Easy-Medium
197 Game Time H ... ... Easy-Medium
198 Mr. Gora and his clever techn... H ... ... Medium
199 The exam H ... ... Easy
200 Registration system H ... ... Medium
201 Alice and rooks H ... ... Medium
202 Text editor H ... ... Hard
203 Furthest vertex H ... ... Medium-Hard
204 Iron man vs Captain America H ... ... Easy
205 killjee and balloons H ... ... Very-Easy
206 Anmol And Divisors H ... ... Easy-Medium
207 JP and the Escape Plan H ... ... Graph Theory, Recursion, DFS, Algorithms, Easy-Medium
208 Alice and her sequence H ... ... Algorithms, Math, Easy-Medium
209 Simple Game H ... ... Binary Search, Sorting, Easy
210 Confusion H ... ... Easy-Medium
211 Win-the-Game H ... ... Very-Easy
212 Guess H ... ... Very-Easy
213 Prime H ... ... Very-Easy
214 stringer H ... ... Very-Easy
215 Monk and Special Integer H ... ... Binary Search, Algorithms, Easy-Medium
216 Little Monk and Mountains H ... ... Binary Search, Algorithms, Easy-Medium
217 Monk and circular distance H ... ... Algorithms, Easy-Medium
218 Monk and Search H ... ... Binary Search, Easy, Easy
219 Monk Takes a Walk H ... ... Algorithms, searching, Very-Easy
220 Gaurav and Unique Edges H ... ... Medium
221 Aklank H ... ... Easy-Medium
222 Magical Islands H ... ... Easy-Medium
223 Perfect Matching H ... ... Dynamic Programming, Algorithms, Hard
224 Puzzled Grid H ... ... Binary Search, Algorithms, Medium-Hard
225 Palindromic Sum H ... ... FFT, Math, Medium-Hard
226 Edge Destruction H ... ... Graph Theory, Algorithms, Medium
227 Points on line H ... ... Data Structures, Medium-Hard
228 Connected Intervals H ... ... Graph Theory, Algorithms, DFS, Hard
229 N Div Tree H ... ... Graph Theory, Algorithms, Hard
230 Tree of Numbers H ... ... Dynamic Programming, Algorithms, Medium-Hard
231 Pebbles Game H ... ... Ad-Hoc, Data Structures, Easy
232 String Partitioning H ... ... Dynamic Programming, Algorithms, Medium-Hard
233 Monsters in Grid H ... ... Basic Programming, Medium
234 Xor thing H ... ... Graph Theory, Hard
235 Grovyle String H ... ... Very-Easy
236 Milly and the Magic Numbers H ... ... Bitmask, Algorithms, Easy-Medium
237 Simulate Network H ... ... Graph Theory, Sorting, Algorithms, Easy-Medium
238 Xor is Mad H ... ... Bit manipulation, Basic Programming, Easy
239 Good String H ... ... string, Easy
240 The Beatles H ... ... Prime Factorization, LCM, Math, Medium-Hard
241 Football teams H ... ... Binary Search, Disjoint Set, Dynamic Programming, Algorithms, DFS, Medium
242 Trustworthy network H ... ... Floyd Warshall, Dijkstra, Algorithms, Easy-Medium
243 Fibonacci substring H ... ... Combinatorics, Fibonacci, Math, Easy-Medium
244 Hibina H ... ... Math, Easy
245 Fruit shop H ... ... Math, Very-Easy
246 Digits and Fun H ... ... Medium
247 Monk being monitor H ... ... Sorting, Easy-Medium
248 Monk and Sorting Algorithm H ... ... radix sort, Sorting, Easy-Medium
249 Monk and Nice Strings H ... ... Easy
250 Monk and Suffix Sort H ... ... Sorting, Algorithms, Easy
251 Monk and Modulo Based Sorting H ... ... Sorting, Algorithms, Easy
252 Rank List H ... ... Easy
253 Hostel Visit H ... ... Easy
254 Naina Function H ... ... Easy
255 Monk and Rotation H ... ... Data Structures, Easy
256 Little Monk and Good String H ... ... Ad-Hoc, Basic Programming, String Algorithms, Easy
257 Monk and Inversions H ... ... Data Structures, Easy
258 Monk Teaches Palindrome H ... ... Data Structures, String Algorithms, Very-Easy
259 Monk and Welcome Problem H ... ... Data Structures, Very-Easy
260 House Travelling Problem H ... ... Greedy, Minimum Spanning Tree, Algorithms, Easy-Medium
261 XOR of Subarray H ... ... Ad-Hoc, Algorithms, Easy-Medium
262 Micro and Mini H ... ... Algorithms, String Algorithms, Suffix Arrays, Hashing, Easy-Medium
263 Vasya and Work H ... ... Data Structures, Math, Easy-Medium
264 Setting the Alarm H ... ... Easy-Medium
265 Tanjakan H ... ... Easy-Medium
266 Signal Range H ... ... Stack, Easy-Medium
267 Shil and Magic of Arrays H ... ... Sqrt-Decomposition, Math, Hard
268 Sum of Sums H ... ... Algorithms, DFS, Medium-Hard
269 Ways H ... ... Dijkstra, Algorithms, Medium
270 Shil and Lab Assignment H ... ... Matching, Math, Medium
271 Velma and Queries H ... ... Binary Search, Algorithms, DFS, Easy-Medium
272 Velma and Triplets H ... ... Ad-Hoc, Combinatorics, Implementation, Medium, Math, Easy
273 Mancunian in Palindromia H ... ... Basic Programming, Easy
274 Alice and Queries H ... ... Segment Trees, Sorting, Implementation, Data Structures, BIT, Easy
275 Alice and Pairs H ... ... Prime Factorization, Sieve, Math, Number Theory, Easy-Medium
276 Vasya and Mathematical Analysis H ... ... Sieve, Math, Number Theory, Easy-Medium
277 Micro and Optimus Prime H ... ... Math, Easy
278 Bob and Alphabet H ... ... Dynamic Programming, Algorithms, Medium
279 Albums H ... ... Binary Search, Math, Medium
280 Micro and his Son H ... ... Ad-Hoc, Data Structures, Easy
281 Annual Function H ... ... Medium
282 Easylife H ... ... Algorithms, DFS, Easy
283 phi-phi-phi H ... ... Math, Number Theory, Easy
284 Salesmen problem H ... ... Algorithms, Hungarian, Medium
285 K-th mean path H ... ... Data Structures, Fenwick Tree, Hard
286 Explorer's Birthday H ... ... Algorithms, Medium
287 Hamming H ... ... Algorithms, Easy
288 Computer Virus H ... ... Data Structures, Medium
289 Alice and wheel-graph H ... ... Algorithms, Medium-Hard
290 Shooting Range H ... ... Data Structures, Medium-Hard
291 Christmas shopping H ... ... Algorithms, Easy-Medium
292 Easy Money H ... ... Math, Easy-Medium
293 Courtney and convex polygon H ... ... Math, Hard
294 Alice and friends H ... ... Data Structures, Segment Trees, Hard
295 Shootout in London H ... ... Sieve, Math, Easy
296 XOR-Split! H ... ... Gaussian Elimination, Dynamic Programming, Medium
297 Mike's visit to a Black Hole H ... ... Combinatorics, Dynamic Programming, CRT, Medium
298 Gotta Catch 'Em All H ... ... Prime Factorization, Sorting, Easy
299 Vanya and Students again ! H ... ... Very-Easy
300 The Wealthy Landlord H ... ... Math, Easy
301 Vanya and Students H ... ... Very-Easy
302 BlackHat_Test H ... ... string manipulation, Easy
303 Make Groups H ... ... Medium
304 Users and Ratings H ... ... Medium
305 Cake Cutting H ... ... Math, Easy
306 Micro and Courses H ... ... Very-Easy
307 Ryotsu loves Primes H ... ... Basic Programming, Sieve, Math, Easy
308 Traveling Swamp Thing Problem H ... ... Dynamic Programming, Easy-Medium
309 Alex Magic Product H ... ... Modular arithmetic, Simple-math, Easy
310 Special Graph H ... ... Math, Medium
311 Prime Numbers H ... ... Math, Shortest-path, Easy-Medium
312 Benny and Balls H ... ... Implementation, Basic Programming, Medium
313 Byteland Trip H ... ... Floyd Warshall, Binary Search, Algorithms, Medium
314 Boring Marathon H ... ... Math, Easy-Medium
315 Counting In Byteland H ... ... Data Structures, Fenwick Tree, Easy-Medium
316 Closing Ceremony at Lolympics H ... ... Dynamic Programming, Algorithms, Simple-math, Medium
317 Gold at Lolympics H ... ... Prime Factorization, Dynamic Programming, Game Theory, Math, Easy-Medium
318 The Best Player H ... ... Basic Programming, Brute Force, Sorting, Easy
319 Vasya vs Rhezo H ... ... Data Structures, Easy-Medium
320 Awesome Sequence H ... ... Binary Search, Recursion, Dynamic Programming, Math, Easy-Medium
321 Beer And Strings H ... ... Very-Easy
322 A Complex Matrix Count H ... ... Ad-Hoc, Algorithms, Easy-Medium
323 Matt's Graph Book H ... ... Algorithms, Easy
324 Stranger Things H ... ... Easy-Medium
325 Micro and Challenge H ... ... Medium
326 Buy and Sell ! H ... ... Data Structures, Easy-Medium
327 Binary Queries H ... ... Very-Easy
328 Childhood Games H ... ... Easy
329 Open the locks H ... ... Dynamic Programming, Easy-Medium
330 Almost Pallindrome H ... ... Easy-Medium
331 Bear Roars H ... ... Geometry, Math, Medium-Hard
332 Oz's new problem H ... ... Combinatorics, Math, Hard
333 Adjacent Swaps H ... ... Binary Search, String Algorithms, Algorithms, Suffix Arrays, Hashing, Medium
334 Akash and GCD 2 H ... ... Segment Trees, Fenwick Tree, Number Theory, Data Structures, Math, Medium
335 Micro and Binary Strings H ... ... Bit manipulation, Basic Programming, Easy
336 Who's your daddy? H ... ... Easy-Medium
337 VB and His Khelu H ... ... Medium
338 A huge sum H ... ... Sieve, Math, Number Theory, Hard
339 Fun with strings H ... ... Suffix Trees, Suffix Arrays, LCP, Medium-Hard
340 Street racing H ... ... Algorithms, Medium
341 Rescuer H ... ... Algorithms, Easy-Medium
342 Fredo and Large Numbers H ... ... Ad-Hoc, Data Structures, data compression, Easy-Medium
343 Mishki Playing Games H ... ... Ad-Hoc, Basic Programming, Easy
344 Print hackerearth H ... ... Basic Programming, Very-Easy
345 Hexxagon H ... ... Very-Easy
346 Micro and Tree H ... ... Data Structures, Dynamic Programming, Medium
347 Vanya and Array H ... ... Ad-Hoc, Data Structures, BIT, Sorting, Easy-Medium
348 Fredo and Modified Notificati... H ... ... Ad-Hoc, Data Structures, Sorting, Easy-Medium
349 Lucky Digits and Modulo H ... ... Lucky-Digit, Simple-math, Math, Easy
350 Perfect Permutations H ... ... Combinatorics, Dynamic Programming, Math, Hard
351 Maximum Safety H ... ... Medium-Hard
352 KGCD H ... ... Math, Medium
353 Sightseeing Walk H ... ... DFS, Easy-Medium
354 Super String H ... ... Easy
355 Breaking Primes H ... ... Binary Search, Sieve, Math, Easy-Medium
356 Timely Orders H ... ... Binary Search, Data Structures, Easy
357 Bob and Mathematics H ... ... Medium-Hard
358 Xoring in Base 10 H ... ... Meet-in-the-middle, Algorithms, Medium-Hard
359 Unique Subarrays H ... ... Implementation, Data Structures, Hard, Medium
360 Playful Strings H ... ... Implementation, Easy
361 The Dragon Type H ... ... Number Theory, Medium
362 The Ghost Type H ... ... Bitmask, Dynamic Programming, Algorithms, Medium
363 The Psychic Type H ... ... Implementation, Ad-Hoc, Basic Programming, Easy
364 The Electric Type H ... ... Map, Set, Data Structures, Easy-Medium
365 The Grass Type H ... ... Map, Disjoint Set, Trees, Data Structures, Medium-Hard
366 The Normal Type H ... ... Set, Rolling Pointer, Easy-Medium
367 N-Queens H ... ... Backtracking, Easy
368 Ash and shopping H ... ... FFT, Divide And Conquer, Generating Functions, Medium-Hard
369 Kevin and Sticks H ... ... Math, Greedy, Medium
370 Destroying houses H ... ... Geometry, Expectation, Probability, Easy-Medium
371 Killing Assistants H ... ... prob, Math, Easy-Medium
372 Dual issues H ... ... Prime Factorization, easy, Math, Easy
373 Ticket Counter H ... ... Hard
374 Joseph and String H ... ... Segment Trees, String Algorithms, Strings, Suffix Arrays, Data Structures, Hard
375 Nick and JosephLand H ... ... Data Structures, Trees, Medium-Hard
376 Greedy chairman H ... ... Combinatorics, Modular arithmetic, Trees, Medium
377 Joseph and Array H ... ... Combinatorics, Modular arithmetic, Math, Easy-Medium
378 Joseph and Tree H ... ... Data Structures, Trees, Segment Trees, Medium
379 Powers Everywhere! H ... ... Implementation, Data Structures, Binary Search, Math, Easy
380 Milly and pens H ... ... Implementation, Hashing, Data Structures, Easy
381 Milly and special subarrays H ... ... Math, Easy-Medium
382 Mancunian And Fantabulous Genes H ... ... String Algorithms, Hashing, Medium
383 Mancunian And Nancy Play A Game H ... ... Graph Theory, Medium
384 Mancunian And Multiplicative ... H ... ... Sqrt-Decomposition, Medium
385 Mancunian Goes To The Derby H ... ... Graph Theory, Easy-Medium
386 Mancunian And Colored Tree H ... ... Trees, Easy
387 Mancunian And Naughty Numbers H ... ... Number Theory, Easy
388 Milly and equal array H ... ... Math, Number Theory, Easy-Medium
389 Interval count H ... ... Math, Number Theory, Easy
390 Final battle H ... ... Hard
391 Benny and the universal numbers H ... ... Dynamic Programming, Medium-Hard
392 Little Achraf in Who Wants to... H ... ... Medium-Hard
393 Benny and the Universe H ... ... Medium-Hard
394 Little Shino and the Fibonacc... H ... ... Easy-Medium
395 Little Shino and the tournament H ... ... Easy-Medium
396 Little Shino and the coins H ... ... Easy
397 Rhezo and Cinema Hall H ... ... Combinatorics, Data Structures, Dynamic Programming, Easy-Medium
398 JP and rotations H ... ... Ad-Hoc, Data Structures, Easy
399 Mark The Answer H ... ... Data Structures, Easy
400 Divisible Digits H ... ... Hard
401 Covering Chessboard H ... ... Medium-Hard
402 Balanced Buildings H ... ... Easy-Medium
403 Assorted Arrangement H ... ... Algorithms, Greedy, Easy
404 Fredo's Crush H ... ... Bitmask, Graph Theory, Dynamic Programming, Medium
405 Fredo and his Birthday Gift H ... ... Bitmask, Graph Theory, Dynamic Programming, Medium
406 Micro and Permutations H ... ... Graph Theory, Very-Easy
407 Micro and Coins H ... ... Graph Theory, Very-Easy
408 Vasya and Party! H ... ... Data Structures, Graph Theory, DFS, Easy
409 Milly and Chocolates again H ... ... Binary Search, Data Structures, Easy-Medium
410 Encounter with the Lord H ... ... Graph Theory, Bipartite Graph, Medium-Hard
411 The String Monster H ... ... Algorithms, Monthly-Contest, Easy-Medium
412 Gudi and the Magical Orbs H ... ... Dynamic Programming, Medium
413 Gudi trapped in the Room H ... ... DFS, Easy
414 The Castle Gate H ... ... Bit manipulation, Very-Easy
415 Micro and Prime Prime H ... ... Sieve, Data Structures, Easy
416 Roy's Life Cycle H ... ... Implementation, Data Structures, Easy
417 Rhezo and Prime Problems H ... ... Data Structures, Dynamic Programming, Number Theory, Easy
418 Vanya and GCD Array H ... ... Dynamic Programming, Math, Easy
419 Leaf Village and Democracy H ... ... Hard
420 Leaf and Limelight Attack H ... ... Dynamic Programming, Easy
421 Little Shikamaru And Caesar C... H ... ... Medium-Hard
422 Little Boruto And Rail Ways H ... ... BFS, DFS, Trees, Medium-Hard
423 Uchiha Brothers and Two Products H ... ... Bitmask, Dynamic Programming, Hard
424 Jiraiya and Rasengan Attacks H ... ... BIT, Expectation, Medium
425 Akatsuki vs Leaf H ... ... Bitmask, Dynamic Programming, Matching, Easy-Medium
426 Rhezo and Big Powers H ... ... Math, Number Theory, Easy-Medium
427 Vasya and Number Theory H ... ... Dynamic Programming, Math, Number Theory, Easy
428 Happy Vertices H ... ... Easy
429 Gods & Monsters H ... ... Modular arithmetic, Matrix Exponentiation, Modular exponentiation, Number Theory, Math, Hard
430 Somebody That I Used to Know H ... ... Graph Theory, Shortest-path, Medium
431 Kill 'em All H ... ... Combinatorics, Graph Theory, Math, Medium
432 Requiem for a Dream H ... ... Data Structures, Trees, Segment Trees, Medium-Hard
433 One Way Or Another H ... ... Brute Force, Math, Easy
434 Pair Count H ... ... Sieve, Math, Easy-Medium
435 Milly and Chocolates IV H ... ... Implementation, Greedy, Easy
436 Rhezo and Destructive Mind H ... ... Graph Theory, DFS, Very-Easy
437 Rhezo and HackerEarth H ... ... Graph Theory, DFS, Easy
438 Rhezo and Critical Links H ... ... Graph Theory, DFS, Easy
439 Benny And The Broken Odometer H ... ... Recursion, Dynamic Programming, Math, Easy-Medium
440 Benny And Subsets H ... ... Bitmask, Dynamic Programming, Brute Force, Easy-Medium
441 Benny And Interesting numbers H ... ... Number Theory, Easy-Medium
442 Benny And Two Strings H ... ... String Algorithms, Dynamic Programming, Medium-Hard
443 Benny And Her School Reports H ... ... Math, Easy
444 Benny And Shopping H ... ... Implementation, Easy
445 Daisy and the Transformation H ... ... Ad-Hoc, String Algorithms, Easy
446 Unify Numbers H ... ... Implementation, Sorting, Easy-Medium
447 Product divisors H ... ... Number Theory, Easy
448 Taxi Please! H ... ... Sorting, Easy
449 Milly and special array H ... ... Dynamic Programming, Easy-Medium
450 Let's Count H ... ... Math, Number Theory, Easy
451 Find the Flow H ... ... Flow, Easy-Medium
452 Shopping Spree! H ... ... Combinatorics, Dynamic Programming, Easy-Medium
453 Descending Weights H ... ... Sorting, Easy
454 Unlock the Door H ... ... Modular exponentiation, Modular arithmetic, Easy-Medium
455 Double or Divide! H ... ... Data Structures, Greedy, Number Theory, Easy-Medium
456 Monkey and Ball Game H ... ... Graph Theory, Probability, Game Theory, Hard
457 Ways of Seeing H ... ... Medium-Hard
458 Make n00b_land Great Again! H ... ... Binary Search, Segment Trees, BIT, Trees, Medium
459 BooBoo the traveler H ... ... Dynamic Programming, Medium
460 BooBoo and Upsolving H ... ... Binary Search, Greedy, Easy
461 Xenny and Classroom H ... ... Ad-Hoc, Easy
462 Pair Sums H ... ... Easy
463 Palindrome Permutation H ... ... Very-Easy
464 Sum of Primes H ... ... Number Theory, Easy-Medium
465 Daisy and the Password H ... ... Implementation, String Algorithms, Easy
466 Rod Cutting Problem H ... ... Bit manipulation, Easy
467 String Sum H ... ... Implementation, Easy
468 Maximum Difference H ... ... Implementation, Sorting, Easy
469 Infinite Power H ... ... Ad-Hoc, Binary Search, DFS, Easy-Medium
470 Panda and Shopping H ... ... Segment Trees, Dynamic Programming, Data Structures, Fenwick Tree, Medium
471 Avoid boredom H ... ... Recursion, Dynamic Programming, Easy-Medium
472 Toggle String H ... ... Very-Easy
473 Find Product H ... ... Very-Easy
474 Palindromic String H ... ... Very-Easy
475 Count Divisors H ... ... Very-Easy
476 Factorial! H ... ... Very-Easy
477 Tree median H ... ... Backtracking, Hard
478 Prefix numbers H ... ... Dynamic Programming, Matrix Exponentiation, Medium
479 Least common multiple H ... ... Backtracking, Medium
480 Acquire the Cirangles H ... ... Binary Search, Medium
481 Ramesh and Goldsmiths H ... ... Medium
482 Super functions H ... ... Math, Medium-Hard
483 Bridges in Karak H ... ... Medium-Hard
484 Elevator Manager H ... ... Math, Medium
485 Chemical mixture H ... ... Greedy, Easy-Medium
486 Library boy H ... ... Ad-Hoc, Simple-math, Very-Easy
487 4A - Bear and Random Vowels H ... ... Very-Easy
488 Cyclic Permutations H ... ... Z-algorithm, Algorithms, KMP, Medium
489 Rhezo and Division H ... ... Z-algorithm, Dynamic Programming, Algorithms, Medium
490 Omar And Strings H ... ... Z-algorithm, String Algorithms, Hashing, Medium
491 ASCII Value H ... ... Implementation, Very-Easy
492 Oz's paintings H ... ... Ad-Hoc, Combinatorics, Math, Easy
493 Micro and Array H ... ... Segment Trees, Easy-Medium
494 A Problem on String H ... ... Hashing, Very-Easy
495 Crazy Tree 3 H ... ... Modular exponentiation, Modular arithmetic, Math, Medium
496 3B - Bear and Special Dfs H ... ... Segment Trees, Graph Theory, Trees, DFS, Medium
497 3A - Bear and Vectors H ... ... Medium-Hard
498 Flood Fill Algorithm H ... ... Easy-Medium
499 2A - Bear and All Permutations H ... ... Medium
500 1B - Bear and Leaderboard H ... ... Medium
501 1A - Bear and Vowels H ... ... String Algorithms, Very-Easy
502 Prateek and theories H ... ... Sorting, HashMap, Trees, Easy
503 Robots H ... ... Sorting, Math, Easy-Medium
504 Milly and magical array H ... ... Math, Easy
505 Utkarsh and Timed Jumps H ... ... Number Theory, Binary Search, Easy-Medium
506 Choosy Bride H ... ... Segment Trees, Hard
507 Money Change H ... ... Medium
508 Tree Edges Coloring H ... ... Medium
509 Chandu and his Gurudevs H ... ... Graph Theory, Sorting, Disjoint Set, Medium
510 Akash and GCD 1 H ... ... Segment Trees, Fenwick Tree, Math, Number Theory, Medium
511 Difficult Characters H ... ... Ad-Hoc, Implementation, Sorting, Easy
512 Milly and her classmates H ... ... Map, Easy
513 Minimum Spanning Tree H ... ... Medium
514 Easy Non Linear Recurrences H ... ... Hard
515 Easy Linear Recurrences H ... ... Matrix Exponentiation, Medium
516 Delivering Candies H ... ... Easy-Medium
517 The One With The Queries H ... ... Easy
518 Balls H ... ... Easy
519 Maxi and Dumpy H ... ... Basic Programming, Hashing, Easy
520 Trace of a matrix H ... ... Basic Programming, Easy
521 Navi and beer H ... ... Implementation, Basic Programming, Math, Very-Easy
522 Himanshu and Luck H ... ... Recursion, Brute Force, Binary Search, Backtracking, Easy-Medium
523 The Great Amu H ... ... Modular exponentiation, Modular arithmetic, Math, Number Theory, Hard
524 The Great Cyrus H ... ... Flow, Greedy, Hard
525 The Great Charzeh