Why this showing segmentation fault

@aasif2364 make all the elements of the freq array zero first and then add frequency of the array elements
int *freq = new int[mx + 1]{0};
you can do it like this for by using a for loop

I hope I’ve cleared your doubt. I ask you to please rate your experience here
Your feedback is very important. It helps us improve our platform and hence provide you
the learning experience you deserve.

On the off chance, you still have some questions or not find the answers satisfactory, you may reopen
the doubt.