SOLVE

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Bob and Internship

Problem

Editorial

Analytics

Bob got selected for **N** day long internship in which he is required to complete **M** tasks . Each task can be completed in exactly one day . As Bob is very lazy he needs atleat **K** days for rest before starting any new task . In how many ways you can complete these M tasks. It does not matter in which order you complete these M tasks . Also it is not necessary to take rest after the last task . As output can be very large you have to print answer **Modulo** \(10^{9}+7\) .

**NOTE : **Two ways \(D_1,D_2,........,D_M\) and \(D_1^{'},D_2^{'},........,D_M^{'}\)are considered diferent if for any \(1 \leq i \leq M\) \( D_i \neq D_i^{'} \) .

FIrst line of input contains** T **number of test cases** . **

Next T lines contains three space seperated integers **N** , **M** , **K** .

For each test case print the number of ways in which Bob can complete these M tasks in new line .

**\(1 \leq T \leq 10^6\)**

**\(1 \leq M \leq N \leq 10^6\)**

**\(0 \leq K \leq 10^6\)**

Explanation

**Test Case 1 :** There are 4 days in which we have to complete 2 tasks . So possible combinations in which we can complete tasks are \([1,3] , [1,4] , [2,4]\).

You can see we are taking rest of minimum 1 day between two tasks.

**Test Case 2 :** There is only one possible way \([1,4]\) as we have to maintain two day gap between them .

Time Limit:
0.5 sec(s)
for each input file.

Memory Limit:
256 MB

Source Limit:
1024 KB

Marking Scheme:
Marks are awarded when all the testcases pass.

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Initializing Code Editor...

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