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Project Euler 4

  • 問題

Problem 4:Largest palindrome product
A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99.
Find the largest palindrome made from the product of two 3-digit numbers.

  • 解答例
def isPalindromeNum(num):
    numStr = str(num)
    if numStr == numStr[::-1]:
        return 1
    return 0

max = 0
for i in range(100, 1000):
    for j in range(100, 1000):
        if(isPalindromeNum(i * j) and max < i * j):
            max = i * j

print(max)