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Algorithm Grid Placement
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Algorithm Grid Placement

HardPython

Problem

I don't remember exactly, but given an N by N grid representing a farm with cows on it, write a function that would place the cows on the grid to satisfy some requirements.

For this exercise, place exactly one cow in every row and column, with no two cows sharing a diagonal. Return one valid grid, or an empty grid when placement is impossible.

Use def solve_cows(n):. Return an n x n matrix of 0 and 1, where 1 represents a cow.

Constraints

  • 1 <= n <= 14
  • The output must contain exactly n rows and n columns when a solution exists
  • Each cell must be either 0 or 1
  • Return an empty list when no valid placement exists

Function Signature

def solve_cows(n):
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