Submission #742157

#	Time	Username	Problem	Language	Result	Execution time	Memory
742157		iulia13	Sure Bet (CEOI17_sure)	C++14	100 / 100	149 ms	3592 KiB

sure

#include <bits/stdc++.h>

using namespace std;
const int N = 1e5 + 5;
double a[N], b[N];
int main()
{
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++)
    {
        cin >> a[i] >> b[i];
        a[i] -= 1.0;
        b[i] -= 1.0;
    }
    sort(a + 1, a + n + 1);
    reverse(a + 1, a + n + 1);
    sort(b + 1, b + n + 1);
    reverse(b + 1, b + n + 1);
    int j = 1; double sa = 0, sb = 0, ans = 0, now;
    for (int i = 1; i <= n; i++)
    {
        sa += a[i];
        sb -= 1.0;
        now = min(sa, sb);
        ans = max(ans, now);
        int jj = j;
        while (jj <= n)
        {
            if (min(sa - 1.0, sb + b[jj]) > now)
            {
                sa -= 1.0;
                sb += b[jj];
                now = min(sa, sb);
                jj++;
            }
            else
                break;
        }
        ans = max(ans, now);
        j = jj;
    }
    cout << fixed << setprecision(4) << ans;
    return 0;
}

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