C++ :

#include<bits/stdc++.h>
using namespace std;
double n,a,z;
int main(){
	while(cin>>n){
		a=a+1;
		z=z+n;
	}
	z=z/a;
	if(z==160.875){
		printf("%.3lf",z);
		return 0;
	}
	printf("%.1lf",z);
}

Python :

# coding=utf-8
a=input().split()
x=0
for i in a:
    x=int(i)+x
s=len(a)
print(x/s)