Submission #1226002

#	Time	Username	Problem	Language	Result	Execution time	Memory
1226002		mariamp1	Sure Bet (CEOI17_sure)	C++20	100 / 100	49 ms	3552 KiB

sure

#include <bits/stdc++.h>
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;
    vector<double> a(n), b(n);
    for (int i = 0; i < n; i++) cin >> a[i] >> b[i];

    sort(a.rbegin(), a.rend());
    sort(b.rbegin(), b.rend());

    vector<double> pa(n+1, 0), pb(n+1, 0);
    for (int i = 1; i <= n; i++) {
        pa[i] = pa[i-1] + a[i-1];
        pb[i] = pb[i-1] + b[i-1];
    }

    double res = 0;
    for (int i = 0; i <= n; i++) {
        int j1 = lower_bound(pb.begin(), pb.end(), pa[i]) - pb.begin();
        for (int d = -1; d <= 0; d++) {
            int j = j1 + d;
            if (j < 0 || j > n) continue;
            double val = min(pa[i], pb[j]) - (i + j);
            res = max(res, val);
        }
    }

    cout << fixed << setprecision(4) << max(0.0, res) << '\n';
}

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