Submission #1024161

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Source Code Expand

#include <bits/stdc++.h>
 
#define REP(i,n) for(int i=0; i<(int)(n); ++i)
#define FOR(i,k,n) for(int i=(k);i<(int)(n);++i)
typedef long long int ll;
using namespace std;

int main(void) {
    int N, K;
    cin >> N >> K;
    vector<int> R(N);
    REP(i, N) {
        cin >> R[i];
    }

    sort(R.begin(), R.end());
    double ans = 0;
    FOR(i, N-K, N) {
        ans = (ans + R[i]) / 2.0;
    }
    printf("%.10f\n", ans);
}

Submission Info

Judge Result