1432. Max Difference You Can Get From Changing an Integer Medium

1/**
2 * [1432] Max Difference You Can Get From Changing an Integer
3 *
4 * You are given an integer num. You will apply the following steps exactly two times:
5 * 
6 * 	Pick a digit x (0 <= x <= 9).
7 * 	Pick another digit y (0 <= y <= 9). The digit y can be equal to x.
8 * 	Replace all the occurrences of x in the decimal representation of num by y.
9 * 	The new integer cannot have any leading zeros, also the new integer cannot be 0.
10 * 
11 * Let a and b be the results of applying the operations to num the first and second times, respectively.
12 * Return the max difference between a and b.
13 *  
14 * Example 1:
15 * 
16 * Input: num = 555
17 * Output: 888
18 * Explanation: The first time pick x = 5 and y = 9 and store the new integer in a.
19 * The second time pick x = 5 and y = 1 and store the new integer in b.
20 * We have now a = 999 and b = 111 and max difference = 888
21 * 
22 * Example 2:
23 * 
24 * Input: num = 9
25 * Output: 8
26 * Explanation: The first time pick x = 9 and y = 9 and store the new integer in a.
27 * The second time pick x = 9 and y = 1 and store the new integer in b.
28 * We have now a = 9 and b = 1 and max difference = 8
29 * 
30 *  
31 * Constraints:
32 * 
33 * 	1 <= num <= 10^8
34 * 
35 */
36pub struct Solution {}
37
38// problem: https://leetcode.com/problems/max-difference-you-can-get-from-changing-an-integer/
39// discuss: https://leetcode.com/problems/max-difference-you-can-get-from-changing-an-integer/discuss/?currentPage=1&orderBy=most_votes&query=
40
41// submission codes start here
42
43impl Solution {
44    pub fn max_diff(num: i32) -> i32 {
45        0
46    }
47}
48
49// submission codes end
50
51#[cfg(test)]
52mod tests {
53    use super::*;
54
55    #[test]
56    fn test_1432() {
57    }
58}
59