Submission #1275086

#	Time	Username	Problem	Language	Result	Execution time	Memory
1275086		k12_khoi	Sure Bet (CEOI17_sure)	C++17	100 / 100	45 ms	2124 KiB

sure

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

const int N=1e5+5;

int n,l; double res,sum,sumTwo;
double a[N],b[N];

int main()
{
    ios_base::sync_with_stdio(NULL);
    cin.tie(NULL); cout.tie(NULL);

    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>());

    sum=sumTwo=0;
    l=1;
    for (int i=1;i<=n;i++)
    {
        sumTwo+=b[i];
        res=max(res,min(sum,sumTwo)-i-l+1);

        while (l<=n and sum<=sumTwo)
        {
            sum+=a[l];
            l++;

            res=max(res,min(sum,sumTwo)-i-l+1);
        }
    }

    cout << setprecision(4) << fixed << res;
}

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