#include<iostream> // cin\cout\endl using namespace std; int main(){ int y1,y2,y3,cnt=0; cin>>y1>>y2>>y3; if(y1%400==0||y1%100!=0&&y1%4==0) cnt++; if(y2%400==0||y2%100!=0&&y2%4==0) cnt++; if(y3%400==0||y3%100!=0&&y3%4==0) cnt++; cout<<cnt<<endl; return 0; }