What is wrong in my code?

#1

My code works fine for the test case provided. Then why is it showing wrong answer and runtime error for the other test cases? What is wrong?

#2

@Mac2503
Your logic is correct but check the input constraints n is upto 10^6 but your array a[], inc[], decr[] is of size 10^3 which would give segmentation fault for n>10^3. So increase size of these array to 10^6.
Also make these array global. Declare them again and again for each testcase would required lot of memory and give error.

#3

@Mac2503


Here is the updated code. please check

#4

@Mac2503
As I can see you got 100 point for this question. please mark it as resolved.