Gym101194A-Number Theory Problem
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题意:给你一个n,问1~n之间,有多少2^i-1是7的倍数
解题思路:找规律发现n/3即可
#include <iostream>#include <cstdio>#include <cstring>#include <string>#include <algorithm>#include <cmath>#include <map>#include <set>#include <stack>#include <queue>#include <vector>#include <bitset>#include <functional>using namespace std;#define LL long longconst int INF = 0x3f3f3f3f;int main(){ int t, cas = 1, n; scanf("%d", &t); while(t--) { scanf("%d", &n); printf("Case #%d: %d\n", cas++, n / 3); } return 0;}
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