https://mirror.codeforces.com/contest/1097/submission/51276480 : This is the link to my submission for the problem https://mirror.codeforces.com/contest/1097/problem/E. The program gives Munmap_chunk(): invalid pointer error (even for basic testcases like 1 4 4 3 1 2). I am not able to figure out where the problem is. Please help!!
Line 87 assigning on a negative index (par2) and Line 97 lis.size()-2 might go unsigned underflow