Submission #883278

#	Time	Username	Problem	Language	Result	Execution time	Memory
883278		votranngocvy	Sure Bet (CEOI17_sure)	C++14	100 / 100	62 ms	5288 KiB

sure

#include <bits/stdc++.h>
using namespace std;

const int N = 1e5 + 5;
double a[N],b[N],sumA[N],sumB[N];

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    int n;
    cin >> n;
    for (int i = 1; i <= n; i++) cin >> a[i] >> b[i];
    sort(a + 1,a + n + 1,greater<double>());
    sort(b + 1,b + n + 1,greater<double>());
    sumA[0] = 0,sumB[0] = 0;
    for (int i = 1; i <= n; i++) {
        sumA[i] = sumA[i - 1] + a[i];
        sumB[i] = sumB[i - 1] + b[i];
    }
    int j = 1;
    double ans = 0;
    for (int i = 1; i <= n; i++) {
        while (j <= n && min(sumA[i],sumB[j]) - i - j <= min(sumA[i],sumB[j + 1]) - i - j - 1) j++;
        ans = max(ans,min(sumA[i],sumB[j]) - i - j);
    }
    cout << fixed << setprecision(4) << ans << "\n";
}

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