P2676 [USACO07DEC]Bookshelf B

// Problem: P2676 [USACO07DEC]Bookshelf B
// Contest: Luogu
// URL: https://www.luogu.com.cn/problem/P2676
// Memory Limit: 125 MB
// Time Limit: 1000 ms
// User: Pannnn
 
#include <bits/stdc++.h>
 
using namespace std;
 
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    
    long long n, b;
    cin >> n >> b;
    
    vector<int> info(n);
    for (int i = 0; i < n; ++i) {
        cin >> info[i];
    }
    sort(info.begin(), info.end(), greater<int>());
    
    long long res = 0;
    for (int i = 0; i < n && res < b; ++i) {
        res += info[i];
        if (res >= b) {
            cout << i + 1 << endl;
        }
    }
    return 0;
}