#include<bits/stdc++.h> using namespace std; int main(){ int year1,year2,year3; int sum=0; cin>>year1>>year2>>year3; if(year1%400==0||(year1%4==0&&year1%100!=0)){ sum++; } if(year2%400==0||(year2%4==0&&year2%100!=0)){ sum++; } if(year3%400==0||(year3%4==0&&year3%100!=0)){ sum++; } cout<<sum; return 0; }