How to Solve Escape a Large Maze Problem
Master the Escape a Large Maze LeetCode problem with undetectable real-time assistance. Get instant solutions and explanations during your coding interviews.
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Escape a Large Maze
There is a 1 million by 1 million grid on an XY-plane, and the coordinates of each grid square are (x, y). We start at the source = [sx, sy] square and want to reach the target = [tx, ty] square. Ther...
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Understanding the Escape a Large Maze Problem
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Problem Statement
There is a 1 million by 1 million grid on an XY-plane, and the coordinates of each grid square are (x, y). We start at the source = [sx, sy] square and want to reach the target = [tx, ty] square. There is also an array of blocked squares, where each blocked[i] = [xi, yi] represents a blocked square with coordinates (xi, yi). Each move, we can walk one square north, east, south, or west if the square is not in the array of blocked squares. We are also not allowed to walk outside of the grid. Return true if and only if it is possible to reach the target square from the source square through a sequence of valid moves.
Escape a Large Maze
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Examples
blocked = [[0,1],[1,0]], source = [0,0], target = [0,2]falseThe target square is inaccessible starting from the source square because we cannot move. We cannot move north or east because those squares are blocked. We cannot move south or west because we cannot go outside of the grid.
blocked = [], source = [0,0], target = [999999,999999]trueBecause there are no blocked cells, it is possible to reach the target square.
Constraints
0 <= blocked.length <= 200blocked[i].length == 20 <= xi, yi < 106source.length == target.length == 20 <= sx, sy, tx, ty < 106source != targetIt is guaranteed that source and target are not blocked.How Interview Coder Helps with Leetcode Problems
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