P18140 [GeeksforGeeks] Lucky number0707
普及-
题目描述

A n digit number has n*(n+1)/2 sub-numbers. For example, all possible sub-numbers of 975 are 9 7 5 97 75 975. A number is called Lucky if all sub-numbers have different digit product. Digit product of a number is product of its digits.
For example, the number 23 is Lucky. Sub-numbers of it are 2, 3 and 23 and digit products are 2, 3 and 6 respectively (All digit products are different). 975 is also lucky. Print 1 if given Number is Lucky else Print 0.

Example 1:
Input:
N = 324
Output:
1
Explanation:
All subsequences form different Digit
Products. So, Output is 1.
Example 2:
Input:
N = 323
Output:
0
Explanation:
Subsequences 32, and 23 form same
Digit Product, i.e, 6. So, Output is 0.

Your Task:
You don't need to read input or print anything. Your task is to complete the function isLuckyOrNot() which takes an Integer N as input and returns the answer.

Expected Time Complexity: O((Number of Digits)^{2})
Expected Auxiliary Space: O(Number of Digits)

Constraints:
1 <= N <= 10^{18}

输入格式

见题面

输出格式

见题面

样例输入
N = 324
样例输出
1