#include<bits/stdc++.h>
#define int double
using namespace std;
int a,b,c,d,e,f;
signed main(){
	cin>>a>>b>>c>>d>>e>>f;
	cout<<(a+b+c+d+e+f)/6.0;
}

“真”十个整数。

#include<bits/stdc++.h>
#define int long long
#define INF 0x3f3f3f
using namespace std;
double a,b,c,d,e,f;
signed main(){
	cin>>a>>b>>c>>d>>e>>f;
	cout<<(a+b+c+d+e+f)/6.0;
	return 0;
}