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Implement Connect 4
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Implement Connect 4

HardPython

Problem

Implement the Connect 4 game

Asked in the technical phone screen stage. Visible fragment; details hidden behind points wall.

Contract

Implement def connect_four(moves):. moves is a list of zero-based column indices for a standard 6-row by 7-column board. Players alternate, with player 1 moving first. Each piece falls to the lowest available row in its column. Return 1 or 2 when that player first connects four horizontally, vertically, or diagonally. Return 0 if the moves end without a winner.

Constraints

  • 0 <= moves[i] < 7
  • Every move is made in a non-full column
  • 0 <= len(moves) <= 42
  • Players alternate, with player 1 moving first
  • Return the first player to connect four, ignoring later moves

Function Signature

def connect_four(moves):
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