Submission #704219

#	Time	Username	Problem	Language	Result	Execution time	Memory
704219		ld_minh4354	Let's Win the Election (JOI22_ho_t3)	C++17	10 / 100	1 ms	328 KiB

Main

#include<bits/stdc++.h>
using namespace std;

#define int long long
#define fi first
#define se second
#define pb push_back
#define debug(x) cout<<#x<<": "<<x<<"\n"



signed main()
{
	ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
//	freopen("input.000","r",stdin);
//	freopen("output.000","w",stdout);
//	srand((unsigned)time(NULL));
//	rand()
	
	int n,a[505],b[505],size_a,size_b,i,k,x,y;
	long double sum,ans;
	
	cin>>n>>k;size_a=size_b=0;
	for (i=1;i<n+1;i++)
	{
		cin>>x>>y;
		
		if (y!=-1)
		{
			size_a++;
			a[size_a]=x;
		}
		else
		{
			size_b++;
			b[size_b]=x;
		}
	}
	
	sort(a+1,a+size_a+1);
	sort(b+1,b+size_b+1);
	
	ans=1e9;
	for (x=0;x<=k;x++) if (x<=size_a and k-x<=size_b)
	{
		sum=0;
		for (i=1;i<x+1;i++) sum+=(double)a[i]/i;
		for (i=1;i<=k-x;i++) sum+=(double)b[i]/(x+1);
		ans=min(ans,sum);
	}
	
	cout<<fixed<<setprecision(4)<<ans<<"\n";
}

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 33
• Subtask 6: 0 / 11
• Subtask 7: 0 / 23