Compute earliest arrival in time-grid

Q: Compute earliest arrival in time-grid

This question evaluates algorithmic problem-solving and pathfinding skills on grid-based graphs, focusing on modeling time-dependent traversal constraints and reasoning about efficient search and supporting data structures.

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LeetCode 778. Swim in Rising Water – Given an n x n integer grid where grid[i][j] is the earliest time you can enter the cell, starting from (0, 0) move 4-directionally only when the current time is ≥ the target cell's value; find the minimum time to reach (n-1,n- 1).

https://leetcode.com/problems/swim-in-rising-water/description/

Compute earliest arrival in time-grid

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