Leetcode Problem 957. Prison Cells After N Days

957. Prison Cells After N Days

Leetcode Solutions

Simulation with Fast Forwarding

  1. Initialize a hashmap to record each unique state and the day it occurred.
  2. Convert the initial state of cells into a string or a bitmask to use as a key in the hashmap.
  3. Start simulating day by day, updating the state of the cells according to the rules.
  4. After each day, check if the new state has been seen before by looking it up in the hashmap.
  5. If a repeat state is found, calculate the cycle length and determine the remaining days modulo the cycle length.
  6. Fast-forward by setting n to n % cycle_length.
  7. Continue the simulation for n more steps to reach the final state.
  8. Return the final state of the cells.
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Brute Force Simulation

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