import java.util.Scanner;

public class Main $\{$

public static void main$($String$[]$ args$)\{$

Scanner reader $=$ new Scanner$($System$.$in$)$;

final int TIME$\_$DELAY $=45$;

final int HOUR$\_$LEN $=60$;

int absmins $=0$;

do

$\{$

System.out.print$("$Enter a timestamp to modify:"$)$;

String inputline $=$ reader.nextLine$()$;

try $\{$

String $[]$ tokens $=$ inputline.split$("")$;

int hours $=$ Integer.parseInt$($tokens$[0])$;

int mins $=$ Integer.parseInt$($tokens$[1])$;

absmins $=($hours $>0)?($hours $*$ HOUR$\_$LEN $+$ mins$)-$ TIME$\_$DELAY: HOUR$\_$LEN $+$ mins $-$ TIME$\_$DELAY;

$\}$ catch $($java$.$lang.ArrayIndexOutOfBoundsException e$)\{$

System.out.println$("$Entered too few numbers for a timestamp. Try again."$)$;

continue;

$\}$catch $($NumberFormatException e$)\{$

System.out.println$("$Invalid input timestamp. Try again."$)$;

continue;

$\}$

System.out.println$("$New Timestamp: $"+($absmins$/$HOUR$\_$LEN$)+"$ : $"+($absmins$\%$HOUR$\_$LEN$))$;

break;

$\}$while$($true$)$;

reader.close$()$;

$\}$

$\}$