notebook.community

Edit and run



In [ ]:

    
import math
import itertools
start = int(math.sqrt(1020304050607080900))
end = int(math.sqrt(2000000000000000000))
start, end, end - start



In [ ]:

    
def isWhatWeAreLookingFor(n):
    s = str(n)
    return s[0::2] == "1234567890"
assert isWhatWeAreLookingFor(1020304050607080900)



In [ ]:

    
for i in range(start, end):
    if isWhatWeAreLookingFor(i**2):
        print(i)
        break