Why i am not passing all test cases error in some test case is SIGSEGV

#1

problem: https://www.hackerearth.com/challenges/college/acm-summer-challenge-2k20/algorithm/0241d433c8ca4ea4aa0e3eb97f8aca46/

my soln->https://ide.codingblocks.com/s/244926

#2

please explain nmo replies yet

#3

why someone is not replying

#4

Question not accessible
it is possibly some contest