Codeforces 432A Choosing Teams

简单模拟

#include<bits/stdc++.h>using namespace std;int main(){    int n,k,y;    int ans=0;    scanf("%d%d",&n,&k);    for(int i=1;i<=n;i++)    {        scanf("%d",&y);        if(5-y>=k)            ans++;    }    printf("%d\n",ans/3);    return 0;}