Submission #669335

#	Time	Username	Problem	Language	Result	Execution time	Memory
669335		raypeng1729	Sails (IOI07_sails)	C++17	45 / 100	25 ms	3776 KiB

sails

#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(v) v.begin(), v.end()
const int N = 1e4, INF = 1e9 + 1, MOD = 1e9 + 7, K = __lg(N) + 1;
signed main(){
    ios::sync_with_stdio(false); cin.tie(0);
    int n; cin >> n;
    int a[n], b[n], mx = 0;
    for(int i = 0; i < n; i++) cin >> a[i] >> b[i], mx = max(mx, a[i]);
    int pre[mx + 2]{};
    for(int i = 0; i < n; i++){
        pre[0]++, pre[a[i] + 1]--;
    }
    for(int i = 1; i <= mx; i++) pre[i] += pre[i - 1];
    int ans = 0, cnt = accumulate(b, b + n, 0);
    for(int i = mx; i > 0; i--){
        int cur = min(pre[i], cnt / i);
        ans += cur * (cur - 1) / 2;
        cnt -= cur;
    }
    cout << ans;
}

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 5
• Subtask 5: 10 / 10
• Subtask 6: 0 / 10
• Subtask 7: 10 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10
• Subtask 11: 0 / 10