Submission #987495

#	Time	Username	Problem	Language	Result	Execution time	Memory
987495		ErJ	Sure Bet (CEOI17_sure)	C++17	100 / 100	66 ms	3680 KiB

sure

#include <bits/stdc++.h>

#define ll long long
#define rep(i,n) for(int i = 0; i < n; i++)
#define vi vector<ll>
#define vvi vector<vi>
#define pp pair<ll,ll>
#define vp vector<pp>
#define vvp vector<vp>
#define inf 1000000000000000000
#define mod 1000000007

using namespace std;

int main() {
    cin.tie(NULL);
    ios_base::sync_with_stdio(false);
    int n;
    cin >> n;
    vector<double> A(n), B(n);
    rep(i,n){
        cin >> A[i] >> B[i];
    }
    sort(A.begin(), A.end());
    sort(B.begin(), B.end());
    int pocet = 0;
    double a = 0, b = 0;
    int ia = n - 1;
    int ib = n-1;
    double ans = 0;
    while(true){    
        if(a > b){
            if(ib < 0) break;
            pocet++;
            b += B[ib];
            ib--;
        }else{
            if(ia < 0) break;
            pocet++;
            a += A[ia];
            ia--;
        }
        ans = max(ans, min(a - pocet, b - pocet));
    }
    printf("%.4lf",(double)ans);
}

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