Submission #122755

#	Time	Username	Problem	Language	Result	Execution time	Memory
122755		davitmarg	Sure Bet (CEOI17_sure)	C++17	100 / 100	225 ms	3796 KiB

sure

/*DavitMarg*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <bitset>
#include <set>
#include <queue>
#include <deque>
#include <stack>
#include <iterator>
#include <ctype.h>
#include <stdlib.h>
#include <cassert>
#include <fstream>
#define mod 1000000007ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(),v.end()
using namespace std;

int n,k;
double a[100005],b[100005],sx,sy,ans=0;

int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
		cin>>a[i]>>b[i];
    sort(a+1,a+1+n);
    sort(b+1,b+1+n);
    reverse(a+1,a+1+n);
    reverse(b+1,b+1+n);
    for(int i=0;i<=n;i++)
	{
        sx+=a[i];
        while(k<n && min(sx,sy)-(double)i-(double)k<=min(sx,sy+b[k+1])-(double)i-(double)k-1.0)
		{
            k++;
            sy+=b[k];
		}
			ans=max(ans,min(sx,sy)-(double)i-(double)k);
	}
    printf("%.4lf\n",ans);
	return 0;
}

/*

2
2 2
1 3



*/

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