I am doing this problem. Can someone please tell me why i am getting tle verdict. My submission is in python. My submission : https://mirror.codeforces.com/contest/1283/submission/88064624
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Removing from index $$$i$$$ of a list should be $$$O(n - i)$$$, so repeatedly removing from the beginning — middle of the list will cause TLE.
I was removing the elements from a set. Shouldn't it be O(1) operation. And in the last part,i am popping the element from the list treating it like a double ended queue.So it should also take O(1) time.
Am i missing something?
I think popping the last element is $$$O(1)$$$, but popping the first is $$$O(n)$$$: https://stackoverflow.com/questions/195625/what-is-the-time-complexity-of-popping-elements-from-list-in-python/46136638#:~:text=Yes%2C%20it%20is%20O(1,list%20has%20to%20be%20shifted).&text=With%20an%20argument%20to%20pop,case%20time%20complexity%20O(k)
Use a deque to do both operations in $$$O(1)$$$.