KGCD
Tag(s):

## Math, Medium

Problem
Editorial
Analytics

Kevin recently learned a new algorithm called Greatest Common Divisor. He tried to implement it but he failed. He called this new algorithm Kevin's Greatest Common Divisor (KGCD). You can look at this implementation:

long long kgcd(long long a, long long b)
{
while (a > 0 && b > 0)
{
a -= b;
swap(a , b);
}
return a + b;
}


Now Kevin runs $kgcd(a,b)$ for all $1 \le a \le N$, $1 \le b \le N$. He is interested in how many times his algorithm returns the correct gcd value of a and b.

Input format:

The first line of input will contain an integer T, denoting the number of test cases.
Each of the next T lines contain one integer N.

Output format:

For every test case output the number of times $kgcd(a,b)==gcd(a,b)$.

Constraints:

• $1 \le T \le 10$
• (20 points): $1 \le N \le 1000$
• (30 points): $1 \le N \le 10^6$
• (50 points): $1 \le N \le 10^{12}$
SAMPLE INPUT
2
4
2

SAMPLE OUTPUT
14
4

Explanation

In the first case $kgcd$ works correct for all $a,b$ except $(2,3)$ and $(3,4)$.

Time Limit: 10.0 sec(s) for each input file.
Memory Limit: 256 MB
Source Limit: 1024 KB
Marking Scheme: Marks are awarded when all the testcases pass.
Allowed Languages: C, C++, C++14, Clojure, C#, D, Erlang, F#, Go, Groovy, Haskell, Java, Java 8, JavaScript(Rhino), JavaScript(Node.js), Julia, Kotlin, Lisp, Lisp (SBCL), Lua, Objective-C, OCaml, Octave, Pascal, Perl, PHP, Python, Python 3, R(RScript), Racket, Ruby, Rust, Scala, Swift, Visual Basic

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## This Problem was Asked in

Challenge Name

September Clash '16

OTHER PROBLEMS OF THIS CHALLENGE
• Algorithms > Graphs
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