Submission #1019642

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019642		overwatch9	Sure Bet (CEOI17_sure)	C++17	0 / 100	1 ms	348 KiB

sure

#include <bits/stdc++.h>
using namespace std;
using dbl = double;
int main() {
    int n;
    cin >> n;
    vector <pair <dbl, dbl>> nums(n);
    for (int i = 0; i < n; i++)
        cin >> nums[i].first >> nums[i].second;
    vector <dbl> a(n), b(n);
    for (int i = 0; i < n; i++) {
        a[i] = nums[i].first;
        b[i] = nums[i].second;
    }
    sort(a.begin(), a.end());
    sort(b.begin(), b.end());
    dbl l = a.back(), r = b.back();
    dbl ans = max((dbl)0, min(l, r) - (dbl)2);
    for (int cnt = 4, pt = n-2; cnt <= n*2; cnt += 2, pt--) {
        if (r - l > 0.000000001)
            l += a[pt];
        else
            r += b[pt];
        ans = max(ans, min(l, r) - (cnt - 1));
        if (r - l > 0.0000000001)
            r += b[pt];
        else
            l += a[pt];
        ans = max(ans, min(l, r) - cnt);
    }
    cout << fixed << setprecision(4) << ans << '\n';
}

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