Submission #1027630

#	Time	Username	Problem	Language	Result	Execution time	Memory
1027630		vjudge1	Sure Bet (CEOI17_sure)	C++17	100 / 100	68 ms	3192 KiB

sure

#include<bits/stdc++.h>
#define ll long long
#define ld long double
#define all(v) begin(v), end(v)
#define pi pair<int, int>
#define vi vector<int>
using namespace std;
const int maxn = 1e5+3;
int n;
double a[maxn], b[maxn];
int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> a[i] >> b[i];
        a[i] = a[i] - 1.0;
        b[i] = b[i] - 1.0;
    }
    sort(a+1, a+n+1, greater<double>());
    sort(b+1, b+n+1, greater<double>());
    int i = 1, j = 1;
    double res = 0;
    double suma = 0, sumb = 0;
    while(i <= n){
        suma += a[i];
        i++;
        while(j <= n && min(suma - j + 1, sumb - i + 1) <= min(suma - j, sumb + b[j] - i + 1)){
            sumb += b[j];
            j++;
        }
        res = max(res, min(suma - j + 1, sumb - i + 1));
    }
    cout << fixed << setprecision(4) << res;
    return 0;
}

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