languge C, don't modify input array.
Why for n = 6 expected 3?
Array = {4, 8, 12, 12, 3, 6, 2}

Submitted: 0

Expected: 3

Log
n = 2
1 1 3 3
res = 4
n = 4
1 1 5 6 9 16 27
res = 3
n = 6
4 8 12 12 3 6 2
res = 0

Thanks for answer!
It was my mistake: empty input srting was reason of problem with memory.

C, use malloc() and free() for memory.

Hi everyone!
Solution passed all sample tests, works fine in IDE, but when I try attempt I get next error in one of tests:
Test Crashed
Caught unexpected signal: SIGSEGV (11). Invalid memory access.
How can I get string, which crashed test?
Thanks!

"aabBcde" -> 2 # 'a' occurs twice and 'b' twice (b and B)