Submission #122086

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Source Code Expand

#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <climits>
#include <cfloat>
#include <functional>
using namespace std;

int main()
{
    int n, k;
    cin >> n >> k;

    vector<int> r(n);
    for(int i=0; i<n; ++i)
        cin >> r[i];
    sort(r.begin(), r.end());

    double ret = 0.0;
    for(int i=n-k; i<n; ++i)
        ret = (ret + r[i]) / 2.0;
    printf("%.10f\n", ret);

    return 0;
}

Submission Info

Judge Result