Submission #1019692

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019692		overwatch9	Sure Bet (CEOI17_sure)	C++17	100 / 100	96 ms	5300 KiB

sure

#include <bits/stdc++.h>
using namespace std;
int main() {
    int n;
    cin >> n;
    vector <pair <double, double>> nums(n);
    for (int i = 0; i < n; i++) {
        double a, b;
        cin >> a >> b;
        nums[i].first = a;
        nums[i].second = b;
    }
    vector <double> a(n), b(n);
    for (int i = 0; i < n; i++) {
        a[i] = nums[i].first;
        b[i] = nums[i].second;
    }
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    double l = 0, r = 0;
    double ans = 0;
    int pt1 = n-1, pt2 = n-1;
    double cnt = 0;
    while (cnt < 2 * n) {
        if ((l < r && pt1 >= 0) || pt2 < 0) {
            l += a[pt1];
            pt1--;
        } else {
            r += b[pt2];
            pt2--;
        }
        cnt++;
        ans = max(ans, min(l, r) - cnt);
    }
    printf("%.4lf", ans);
}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 40 / 40