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Grokking the Coding Interview Patterns in C++

Solution: Dungeon Game

Understand how to implement a dynamic programming approach to determine the minimum health a knight needs to rescue the princess safely. Explore the step-by-step reverse calculation method, managing health changes across the dungeon grid, and learn how to optimize the solution for time and space complexity.

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Statement

A group of demons has captured a princess and locked her in the bottom-right corner of a dungeon. The dungeon is represented as a 2D grid of size m×nm × n, where each cell contains an integer value that affects the knight’s health.

The knight, starting in the top-left corner of the grid, must travel through the dungeon to rescue the princess.
He can move only to the right or downward at each step.

  • If a cell ...