m,n = input().split() m,n = int(m),int(n) cnt = 0 #计数器 for x in range(m,n+1): #x是三位数 a = x//100 b = x//10%10 # 35|6--> 3|5 --5 c = x %10 if x == a**3 + b**3 +c**3: cnt +=1 res = 0 if cnt==0 else cnt print(res)