TikTok E-commerce First Round: Tic-Tac-Toe Game-Over Check Pushed Down to O(1)

Team: e-commerce Interview language: Chinese Round: first round It went straight into coding. I had GPT reconstruct the coding question, so just bear with it: The problem is a modified version of LeetCode 348 Design Tic-Tac-Toe. The difference is that it doesn't ask you to design a TicTacToe class and move(). Instead you're given the current n x n board directly and you implement GameOver(board)…

Shared by a candidate · reported Sep 2026. Interview formats change; use it as a guide, not a script.