#include<iostream> #include<cstdio> //scanf()\printf() #include<cstring> #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int sum=0,n; for(int i=1;i<=7;i++){ cin>>n; sum=sum+n; } cout<<sum/7; return 0; }