Problem during executing shortest path string program

#1

what is wrong with my code.
code link : https://ide.codingblocks.com/s/230763

and also what is meaning of following errors:

runguard: warning: timelimit exceeded (wall time): aborting command

runguard: warning: command terminated with signal 15

#2

hi @sk1 the problem is that you did not use “enter” while giving input, so the while loop executes endlessly. If you press enter after giving input, it will run perfectly.

#3

what does “signal 15” denotes

#4

@sk1 it is an internal error raised by the ide, in case of a TLE