#include <iostream>
#include <functional>
#include <numeric>
#include <vector>
using namespace std;
 
 
   int main(){
 
       const int n = 10; /* number of the elements (>0) */
       vector<int> vv;
       int tmp;
       for(int i=0;i<n;i++)
        {
           cin>>tmp;
           vv.push_back(tmp); /* one way to insert the element to the last position in the vector */
        }
        double mean = accumulate(vv.begin(), vv.end(), 0.0) / vv.size(); /* or you can write /n */
       cout<<"Required mean = "<< mean <<endl;
       return 0;
    }

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