def isSquare(n):
for i in range(1,n+1):
if i**2==n:
return 1
return 0
###################
m=int(input())
n=int(input())
c=0
for i in range(m,n+1):
if isSquare(i)==1:
c=c+1
print(c)
09-28
2268

04-28
3663

03-08
1574

04-18
1657

12-10
2079
