Viewing insights from Codeforces 1860C: Game on Permutation that are similar (thus shared) with only this insight from Codeforces 1746D: Paths on the Tree: Take advantage when there are TWO choices available for some objects. This can be an indication to use DP. Consider storing the difference between the two choices and sorting to determine the optimal choices. by mathmastersd
- Iterate through the indices 1 to n, storing the winning and losing positions. Remember that a position is winning when it can move to a losing position, or when it has no moves. by Solarion
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