#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() #include<cstring> // strcpy()\strcat()\strcmp()\strlen()\memset() #include<cmath> //sqrt()\pow()\abs()\ceil()\floor()\max()\min() using namespace std; int main(){ int a,b,c,x=0; cin>>a>>b>>c; if(a%4==0&&a%100!=0||a%400==0)x++; if(b%4==0&&b%100!=0||b%400==0)x++; if(c%4==0&&c%100!=0||c%400==0)x++; cout<<x; return 0; }