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