제출 #409073

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
409073		iulia13	Sure Bet (CEOI17_sure)	C++14	100 / 100	185 ms	3560 KiB

sure

#include <iostream>
#include <algorithm>
#include <iomanip>
using namespace std;
const int N = 1e5 + 5;
double a[N];
double b[N];
int main()
{
    int i, n;
    double ans = 0;
    double sumA = 0, sumB = 0;
    cin >> n;
    for (i = 1; i <= n; i++)
    {
        cin >> a[i] >> b[i];
        a[i] -= 1.0;
        b[i] -= 1.0;
    }
    sort(a + 1, a + n + 1);
    sort(b + 1, b + n + 1);
    reverse(a + 1, a + n + 1);
    reverse(b + 1, b + n + 1);
    int j = 1;
    for (i = 1; i <= n; i++)
    {
        sumA += a[i];
        sumB -= 1.0;
        double prv = min(sumA, sumB);
        ans = max(ans, prv);
        int h = j;
        while (h <= n)
        {
            if (min(sumA - 1.0, sumB + b[h]) > prv)
            {
                sumA -= 1.0;
                sumB += b[h];
                prv = min(sumA, sumB);
                ans = max(ans, prv);
                h++;
            }
            else
                break;
        }
        j = h;
    }
    cout << fixed << setprecision(4) << ans;
    return 0;
}

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