Submission #2972996

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Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

int main(){
  int n, k;
  cin >> n >> k;
  vector<int>a(n);
  for(int i=0; i<n; i++)cin >> a[i];
  sort(a.rbegin(), a.rend());
  int sum=0, cnt=0;
  while(sum<k && cnt<n){
    sum += a[cnt];
    cnt++;
  }
  cout << (sum>=k ? cnt : -1);
  return 0;
}

Submission Info

Judge Result