C++ :

#include <bits/stdc++.h>
using namespace std;
int main(){
	float a,b,c,d,e,f,g,h,i,j,ans;
	cin>>a>>b>>c>>d>>e>>f>>g>>h>>i>>j;
	ans=a+b+c+d+e+f+g+h+i+j;
	ans=ans/10;
	cout<<ans;
} 

Python :

# coding=utf-8
lst = input().split()
s = 0
for i in lst:
    s = (s + float(i))
ave = (s / 10)
print(ave)