a,b,c=map(int,input().split()) s=0 if a%4==0 and a%100!=0 or a%400==0: s=s+1 if b%4==0 and b%100!=0 or b%400==0: s=s+1 if c%4==0 and c%100!=0 or c%400==0: s=s+1 print(s)