Time_Conversion.java

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    static String timeConversion(String s) {
        String time[]=s.split(":");
        if(time[2].contains("PM"))
        { if(Integer.parseInt(time[0])!=12)
             { int hours=Integer.parseInt(time[0])+12;
                time[0]=Integer.toString(hours);
             }
        }
        else if(time[2].contains("AM"))
        {
           if(Integer.parseInt(time[0])==12)
           time[0]="00";
        }
         String str = String.join(":", time);
         String str2=str.substring(0,8);
         return str2;
    }
    

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        String s = in.next();
        String result = timeConversion(s);
        System.out.println(result);
    }
}