시간 제한 | 메모리 제한 | 제출 | 정답 | 맞힌 사람 | 정답 비율 |
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1 초 | 128 MB | 72 | 32 | 21 | 38.889% |
We say that a set X of natural numbers is n-k-special if:
Write a program that:
In the first line of the standard input there are two natural numbers n and k separated by a single space, 1 ≤ n ≤ 100, 0 ≤ k ≤ 400.
In the first line of the standard output there should be written one non-negative integer, which equals the number of n-k-special sets for the given n and k.
5 6
3