Submission #1019656

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019656		overwatch9	Sure Bet (CEOI17_sure)	C++17	0 / 100	0 ms	348 KiB

sure

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int main() {
    int n;
    cin >> n;
    vector <pair <ll, ll>> nums(n);
    for (int i = 0; i < n; i++) {
        double a, b;
        cin >> a >> b;
        nums[i].first = (a * 10000);
        nums[i].second = (b * 10000);
    }
    vector <ll> 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());
    ll l = a.back(), r = b.back();
    ll ans = max(0LL, min(l, r) - 20000);
    int pt1 = n-2, pt2 = n-2;
    ll cnt = 2;
    while (cnt < 2 * n) {
        if (l < r && pt1 >= 0) {
            l += a[pt1];
            pt1--;
        } else {
            r += b[pt2];
            pt2--;
        }
        cnt++;
        ans = max(ans, min(l, r) - cnt * 10000);
    }
    cout << fixed << setprecision(4) << (double)ans / 10000 << '\n';
}

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