Leetcode Problem 1900. The Earliest and Latest Rounds Where Players Compete

1900. The Earliest and Latest Rounds Where Players Compete

Leetcode Solutions

DFS with Pruning and Memoization

  1. Define a recursive DFS function that takes the current state of the tournament (remaining players) and the current round number as arguments.
  2. If the firstPlayer and secondPlayer are set to compete in the current state, update the earliest and latest round numbers and return.
  3. If the current state has been visited before, return the memoized result to avoid redundant calculations.
  4. For each pair of players that can compete in the current round, recursively call the DFS function with the updated state and round number, choosing the winner based on the constraints.
  5. Use memoization to store the results of each state to optimize the search.
  6. Start the DFS with the initial state (all players) and round number 1.
  7. Return the earliest and latest round numbers as the result.
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Iterative Simulation with Bitmasking

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