13th Choosing Team

13th Choosing Team

a.题目链接

Problem - 432A - Codeforces

b. 题解

#include <bits/stdc++.h>
using namespace std;
int main()
{int n, k;cin >> n >> k;int cnt = 0;vector<int>a(n,0);for(auto &i:a)cin >> i;for(int i = 0; i<n; i++){if((5-a[i])>=k)cnt++;}cout << cnt/3;
}

水题，很简单。