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