#include <bits/stdc++.h> using namespace std; int main(){ int a,b,c,sum=0; cin>>a>>b>>c; if((a%4==0)&&(a%100!=0)||(a%400==0)) sum++; if((b%4==0)&&(b%100!=0)||(b%400==0)) sum++; if((c%4==0)&&(c%100!=0)||(c%400==0)) sum++; cout<<sum; }