In the recent Div2 contest [contest:2022], I attempted solving E1 [problem:2022E1]. Upon submitting, the judge returned a TLE on pretest 30 [submission:285739225]. This result was unexpected since my solution had a time complexity of O(n*30). After the contest ended, I revisited my code and made a small change by replacing **push_back** with ** emplace_back**. I then resubmitted the code, and surprisingly, this time it was accepted [submission:285743685]. I am unsure why this happened—whether the time limit was too strict or if this was not the intended solution. Can someone please address my issue ?