Given an integer x which contains d digits, find the value of (minimum) n (n > 1) such that the last d digits of x^n is equal to x. If the last d digits will never equal x, return inf.
Example 1:
- x = 2; (therefore d = 1)
- 2^2 = 4, 2^3 = 8, 2^4 = 16, 2^5 = 32
- n = 5;
Example 2:
- x = 10; (therefore d = 2)
- 10^2 = 100, 10^3 = 1000, etc
- n = inf;
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is it correct for 35197? Im getting 5001 instead of inf.
I also get 5001.
10016 and 10081 have another valid answer: 1251 (besides 626). The problem should accept them or request the minimum exponent.