Submission #585386

#	Time	Username	Problem	Language	Result	Execution time	Memory
585386		tengiz05	Sure Bet (CEOI17_sure)	C++17	100 / 100	84 ms	5196 KiB

sure

#include <bits/stdc++.h>

using i64 = long long;
using namespace std;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    int n;
    cin >> n;
    
    vector<double> a(n), b(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i] >> b[i];
    }
    
    sort(a.begin(), a.end(), greater());
    sort(b.begin(), b.end(), greater());
    
    vector<double> pa(n + 1), pb(n + 1);
    
    for (int i = 0; i < n; i++) {
        pa[i + 1] = pa[i] + a[i];
        pb[i + 1] = pb[i] + b[i];
    }
    
    double ans = 0;
    
    for (int i = 1, j = 0; i <= n; i++) {
        while (j < n && pb[j] < pa[i]) {
            j++;
        }
        ans = max(ans, min(pa[i], pb[j]) - i - j);
    }
    
    for (int i = 1, j = 0; i <= n; i++) {
        while (j < n && pa[j] < pb[i]) {
            j++;
        }
        ans = max(ans, min(pa[j], pb[i]) - i - j);
    }
    
    cout << fixed << setprecision(4);
    cout << ans << "\n";
    
    return 0;
}

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