https://www.luogu.com.cn/problem/P2676
代码：
#include <bits/stdc++.h>
using namespace std;#if 1
#define MAXN 20480
long long a[MAXN];
#endif // 0
bool cmp(int a,int b)
{return a>b;
}
int main()
{int n,x,i,y=0,cnt=0;cin>>n>>x;for(i=1; i<=n; i++){cin>>a[i];}sort(a+1,a+n+1,cmp);for(i=1; i<=n; i++){if(y<x){cnt++;y=y+a[i];}else{break;}}cout<<cnt<<endl;return 0;
}