Submission #1649280

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Source Code Expand

#include<iostream>
#include<vector>
#include<algorithm>
#include<cstdio>
using namespace std;
int main(){
  int n,m;
  cin>>n>>m;
  vector<int>a(n);
  for(int i=0;i<n;i++)
    cin>>a[i];
  sort(a.begin(),a.end(),greater<int>());
  double ans=0;
  for(int i=m-1;i>=0;i--){
    ans=(double)(ans+a[i])/2;
  }
  printf("%.9lf\n",ans);
  return 0;
}

Submission Info

Judge Result