You are given a string time in the form of hh:mm, where some of the digits in the string are hidden (represented by ?).
The valid times are those inclusively between 00:00 and 23:59.
Return the latest valid time you can get from time by replacing the hidden digits.
Example 1:
Input: time = "2?:?0" Output: "23:50" Explanation: The latest hour beginning with the digit '2' is 23 and the latest minute ending with the digit '0' is 50. Example 2:
Input: time = "0?:3?" Output: "09:39" Example 3:
Input: time = "1?:22" Output: "19:22"
Constraints:
time is in the format hh:mm. It is guaranteed that you can produce a valid time from the given string.
public class Solution {
public string MaximumTime(string time) {
var times = time.ToCharArray();
if(times[0] == '?') {
times[0] = times[1] <= '3' || times[1] == '?' ? '2' : '1';
}
if(times[1] == '?') {
times[1] = times[0] == '2' ? '3' : '9';
}
if(times[3] == '?') {
times[3] = '5';
}
if(times[4] == '?') {
times[4] = '9';
}
return new String(times);
}
}Time Complexity: O(1)
Space Complexity: O(1)
