河南萌新（2024）（河南农业大学）（旅途的终点）
G-旅途的终点_河南萌新联赛2024第（一）场：河南农业大学 (nowcoder.com)
#include <bits/stdc++.h>using namespace std;
typedef long long ll;
typedef double db;
typedef long double ldb;
typedef pair<int, int> pii;
typedef pair<ll, ll> PII;
#define pb emplace_back
//#define int ll
#define all(a) a.begin(),a.end()
#define x first
#define y second
#define ps push_back
#define endl '\n'
#define IOS ios::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define lc u << 1
#define rc u << 1 | 1void solve();const int N = 1e6 + 10;signed main() {IOS;ll t = 1;
// cin >> t;while (t--)solve();return 0;
}void solve() {ll n, m, k; cin >> n >> m >> k;priority_queue<ll,vector<ll>,greater<>> q;ll sum = 0,sum_mianyi = 0;ll ans = 0;for(int i = 1; i <= n; ++ i){ ll x; cin >> x;sum += x;sum_mianyi += x;q.push(x);while(q.size() > k){sum_mianyi -= q.top();q.pop();}if(sum - sum_mianyi >= m){break;}ans = i;}cout << ans << endl;
}