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