Submission #939559

#	Time	Username	Problem	Language	Result	Execution time	Memory
939559		phoenix0423	Sure Bet (CEOI17_sure)	C++17	100 / 100	69 ms	3664 KiB

sure

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
#define fastio ios::sync_with_stdio(false), cin.tie(0)
#define pb push_back
#define eb emplace_back
#define f first
#define s second
#define int long long
const int maxn = 2e5 + 5;

signed main(void){
    fastio;
    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<double>());
    sort(b.begin(), b.end(), greater<double>());
    int id = 0, id2 = 0;
    double ta = 0, tb = 0;
    double ans = 0;
    for(int i = 0; i < 2 * n; i++){
        if(id < n && ta <= tb){
            ta += a[id++];
        }
        else if(id2 < n && tb <= ta){
            tb += b[id2++];
        }
        else break;
        ans = max(ans, min(ta, tb) - i - 1);
    }
    cout<<fixed<<setprecision(4)<<ans<<"\n";
}

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