Codeforces Round #246 (Div. 2) A. Choosing Teams

排个序，对每个队的尾判断一下，贪心水题

#include<cstdio>#include<algorithm>using namespace std;int a[2010];int main(){    int n,k;    scanf("%d %d",&n,&k);    for(int i=0;i<n;i++)        scanf("%d",&a[i]);    sort(a,a+n);    int num=0;    for(int i=2;i<n;i+=3)    {        if((a[i]+k)<=5)        num++;    }    printf("%d\n",num);    return 0;}