Submission #1027250

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027250		coin_	Sure Bet (CEOI17_sure)	C++14	60 / 100	2077 ms	3528 KiB

sure

#include <bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(NULL);
    int n;
    cin >> n;
    double a[n+1], b[n+1];
    for (int i = 1; i <= n; i++){
        cin >> a[i] >> b[i];
    }
    sort(a+1, a+n+1, greater<double>());
    sort(b+1, b+n+1, greater<double>());
    double prefA[n+1] = {0}, prefB[n+1] = {0};
    prefA[1] = a[1];
    prefB[1] = b[1];
    for (int i = 2; i <= n; i++){
        prefA[i] = prefA[i-1] + a[i];
        prefB[i] = prefB[i-1] + b[i];
    }
    double ans = 0;
    for (int i = 1; i <= n; i++){
        int l = 1, r = n;
        while (l <= r){
            ans = max(ans, min(prefA[i] - (double)i - (double)l, prefB[l] - (double)i - (double)l));
            l++;
        }
    }
    cout << fixed << setprecision(4) << ans;
}

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