in the recent Codeforces Round #781 (Div. 2) problem B — Array Cloning Technique https://codeforces.net/contest/1665/problem/B the judge showed an unusual behaviour i submitted two solutions both with similar logic, the only difference was that the first submission 153036076 uses unorderd_map which resulted in a tle but the second submission 153075593 which uses map got accepted, can anyone explain how.