I am continuously getting TLE on "substring search" (question 1 of step 3 ). I tried declaring global variables, tried passing reference to vectors, reduced function calls but nothing worked. According to me, my code is O(nlogn). Can someone please help me in finding why I am getting TLE. Here is the code: https://codeforces.net/edu/course/2/lesson/2/3/practice/contest/269118/submission/85793528