样例没问题，代码好像也没啥大毛病

#include<bits/stdc++.h>
using namespace std;
int main(){
   int n;
   int a[105];
   int x;
   int sum = 0;
   cin >> n;
   for(int i = 1;i<=n;i++){
   	cin >> a[i];
   }
   cin >> x;
   sort(a+1,a+n+1);
   int i = 1;
   while(x>=a[i]){
   	sum++;
   	x-=a[i];
   	i++;
   } 
   cout << sum;
   return 0;
} 

但就是过不去啊啊啊啊啊！