Submission #1362339

#	Time	Username	Problem	Language	Result	Execution time	Memory
1362339		Newtonabc	Sure Bet (CEOI17_sure)	C++20	100 / 100	58 ms	1976 KiB

sure

#include<bits/stdc++.h>
using namespace std;
const int N=1e5+10;
double a[N],b[N];
int main(){
    int n; 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>());
    double ans=0;
    double cl=0,cr=0;
    int p=1;
    for(int i=1;i<=n;i++){
        cl+=a[i]-1.0;
        cr-=1.0;
        while(p<=n && cr+(b[p]-1.0)<=cl-1.0){
            cl-=1.0;
            cr+=b[p]-1.0;
            p++;
        }
        ans=max(ans,cr);
        if(p<=n) ans=max(ans,cl-1.0);
    }
    cout<<fixed <<setprecision(4) <<ans;
}

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