Submission #928367

#	Time	Username	Problem	Language	Result	Execution time	Memory
928367		Aiperiii	Sure Bet (CEOI17_sure)	C++14	20 / 100	45 ms	348 KiB

sure

#include <bits/stdc++.h>
#define int long long
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define pb push_back
using namespace std;
const int N=1e5+5;
signed main(){
    int n;
    cin>>n;
    vector <long double> a(n),b(n);
    for(int i=0;i<n;i++){
        cin>>a[i]>>b[i];
    }
    long double ans=-1e9;
    for(int mask1=0;mask1<(1<<n);mask1++){
        long double sum1=0,cnt1=0;
        for(int i=0;i<n;i++){
            if((mask1 & (1<<i))!=0){
                cnt1++;
                sum1+=a[i];
            }
        }
        //cout<<sum1<<" "<<cnt1<<"\n";
        for(int mask2=0;mask2<(1<<n);mask2++){
            long double sum2=0,cnt2=0;
            for(int i=0;i<n;i++){
                if((mask2 & (1<<i))!=0){
                    cnt2++;
                    sum2+=b[i];
                }
            }
            long double x=min(sum1-cnt1-cnt2,sum2-cnt1-cnt2);
            ans=max(ans,x);
        }
    }
    cout<<fixed<<setprecision(4)<<ans<<"\n";
}
/*
4
1.4 3.7
1.2 2
1.6 1.4
1.9 1.5
 */

• Subtask 1: 20 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 40