import math
n= int(input())
a=0
while True:
a+=1
m=int(math.sqrt(a+168))
if a>n and m*m==(a+168):
print(a)
break
num = int(input()) + 1
while True:
a = num + 168
sq = int(sqrt(a))
if(sq*sq==a):
print(num)
break
num += 1