# include<iostream> # include<cstdio> using namespace std; int main(){ /* int a,b,n; cin>>a>>b; n=a*b; cout<<n; */ /* int a,b,c,n; cin>>a>>b>>c; n=a*b*c; cout<<n; */ int a,b,c,n; cin>>a>>b>>c; n=(a+b)/c; cout<<n; return 0; }