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Given n different objects, you want to take k of them. How many ways to can do it?For example, say there are 4 items; you want to take 2 of them. So, you can do it 6 ways.Take 1, 2 Take 1, 3 Take 1,

1256 乘法逆元 基准时间限制：1 秒 空间限制：131072 KB 分值: 0 难度：基础题 收藏 关注 给出2个数M和N(M < N)，且M与N互质，找出一个数K满足0 < K < N且K * M % N = 1，如果有多个满足条件的，输出最小的。 Input 输入2个数M, N中间用空格分隔（1 <= M < N <= 10^9) Output 输出一个数K，满足0 < K <