#include <iostream> using namespace std; int main(){ int year1,year2,year3,c=0; cin>>year1>>year2>>year3; if((year1%4==0&&year1%100!=0)||year1%400==0){ c++; } if((year2%4==0&&year2%100!=0)||year2%400==0){ c++; } if((year3%4==0&&year3%100!=0)||year3%400==0){ c++; } cout<<c<<endl; }