Submission #1258010

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Source Code Expand

#include <algorithm>
#include <iostream>
#include <cstdio>
#include <string>
#include <cstring>
#include <cctype>
#include <cstdlib>
#include <cmath>
using namespace std;

#define FOR(i,n) for(int i=0;i<n;i++)
#define PRINT(a) cout<<a<<"\n"
#define QUO(x,y) (x-x%y)/y	//x÷yの商

int main(){

	int n,k,r[4000];
	double x=0;

	cin>>n>>k;

	FOR(i,n)cin>>r[i];

	sort(r,r+n);

	FOR(i,k){
		r[i]=r[i+(n-k)];

		x=(x+r[i])/2;
	}

	printf("%.7f\n",x);

	return 0;
}

Submission Info

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