Submission #467566

#	Time	Username	Problem	Language	Result	Execution time	Memory
467566		idk321	Sure Bet (CEOI17_sure)	C++17	100 / 100	97 ms	3524 KiB

sure

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

const int N = 100005;
double odds [2][N];

double sum[2][N];

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

    int n;
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> odds[0][i] >> odds[1][i];
    }
    sort(odds[0], odds[0] + n, greater<double>());
    sort(odds[1], odds[1] + n, greater<double>());



    double val2 = odds[1][0];
    int j = 0;
    double res = 0;
    double val1 = 0;
    for (int i = 0; i < n; i++) {
        val1 += odds[0][i];


        while (j + 1 < n && (min(val1, val2)- i - j - 2) < (min(val1, val2 + odds[1][j + 1]) - i - j - 3)) {
            j++;
            val2 += odds[1][j];
        }

        res = max(res, min(val1, val2)- i - j - 2);
    }

    cout << fixed << setprecision(4) << res << "\n";
}

/*
4
1.4 3.7
1.2 2
1.6 1.4
1.9 1.5
*/

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