生成组合

#include<bits/stdc++.h> int a[] = {19,2,38,46,5,64,7,81,92,10,11,12,13,14,15}; //n个元素选择m个生成组合 int count_1(int n){ int cnt = 0; while( n ){ n = n & ( n -1); ++cnt; }

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