Submission #701609

#	Time	Username	Problem	Language	Result	Execution time	Memory
701609		GrandTiger1729	Sure Bet (CEOI17_sure)	C++17	60 / 100	2078 ms	4768 KiB

sure

#include <iostream>
#include <iomanip>
#include <algorithm>
using namespace std;

int main(){
    cin.tie(0)->sync_with_stdio(0);
    cout << fixed << setprecision(4);
    int n; cin >> n;
    double a[n], b[n];
    for (int i = 0; i < n; i++){
        cin >> a[i] >> b[i];
    }
    sort(a, a + n, greater<double>());
    sort(b, b + n, greater<double>());
    double prefa[n + 1]{}, prefb[n + 1]{};
    for (int i = 0; i < n; i++){
        prefa[i + 1] = prefa[i] + a[i] - 1;
        prefb[i + 1] = prefb[i] + b[i] - 1;
    }
    double ans = 0;
    for (int i = 0; i <= n; i++){
        for (int j = 0; j <= n; j++){
            ans = max(ans, min(prefa[i] - j, prefb[j] - i));
        }
    }
    // int pa = 0, pb = 0;
    // while (pa <= n && pb <= n){
    //     ans = max(ans, min(prefa[pa] - pb, prefb[pb] - pa));
    //     if (prefa[pa] > prefb[pb])
    //         pb++;
    //     else
    //         pa++;
    // }
    // while (pa <= n){
    //     ans = max(ans, min(prefa[pa] - pb, prefb[pb] - pa));
    //     pa++;
    // }
    // while (pb <= n){
    //     ans = max(ans, min(prefa[pa] - pb, prefb[pb] - pa));
    //     pb++;
    // }
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 0 / 40