Submission #1837077

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Source Code Expand

#include <iostream>
#include <vector>
#include <algorithm>
#include <cmath>
#include <iomanip>
using namespace std;

const int N_MAX = 100;
int N;
vector<int> R(N_MAX);
int K;
long double answer = 0;
int main()
{
	cout << fixed << setprecision(7);
	cin >> N;
	cin >> K;
	for(int i =0;i < N;i++)
	{
		cin >> R[i];
	}
	sort(R.begin(),R.begin() + N);
	for(int i =0;i < K;i++)
	{
		answer += R[N - 1 - i] * pow(2,K - 1 - i);
	}
	cout << answer / powl(2,K) << endl;
	return 0;
}

Submission Info

Judge Result