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CS 161 Homework 3 (To do (Next-states (Steps (Don't worry about…

- - - - Use helper functions
      - Correctness only
      - Don't worry about efficiency
        
        Should only take a second anyways
    - - get-square :check:
        
        Argument: state row column (S r c)
        Returns: Value at that square, value of wall otherwise
      - set-square :red_cross:
        
        Argument: state row column value (S r c v)
        Returns: Change the square at row r and column c to have the value v
        
        Problems
        
        We can't use setq
      - try-move :red_cross:
        
        Argument: state direction (S D)
        Returns: State that results in making that move
        
        NIL if invalid move
        
        Representation of D is up to you
        
        Use set-square to update state if valid move #
  - - - Is this admisable
        
        Must right answer in top of comment
- - - - Pushing the box to a blank space
      - Pushing the box to a goal
    - - Player moves where star is
        Becomes keeper
      - Box moves in direction of keeper is
        Becomes keeper
      - Before:
        blank boxstar keeper
      - After:
        box keeper blank
  - - - Can't if
        
        Wall in front of box
        keeperstar box wall
- - - - The last argument of printstates is the delay (in seconds) between successive state display
- - - - Helper to check the columns