- Difficulty: Medium
- Tags: LeetCode, Medium, Array, Matrix, Simulation, leetcode-1222, O(1)
Problem
On a 0-indexed 8 x 8
chessboard, there can be multiple black queens and one white king.
You are given a 2D integer array queens
where queens[i] = [xQueeni, yQueeni]
represents the position of the ith
black queen on the chessboard. You are also given an integer array king
of length 2
where king = [xKing, yKing]
represents the position of the white king.
Return the coordinates of the black queens that can directly attack the king. You may return the answer in any order.
Example 1:
Input: queens = [[0,1],[1,0],[4,0],[0,4],[3,3],[2,4]], king = [0,0] Output: [[0,1],[1,0],[3,3]] Explanation: The diagram above shows the three queens that can directly attack the king and the three queens that cannot attack the king (i.e., marked with red dashes).
Example 2:
Input: queens = [[0,0],[1,1],[2,2],[3,4],[3,5],[4,4],[4,5]], king = [3,3] Output: [[2,2],[3,4],[4,4]] Explanation: The diagram above shows the three queens that can directly attack the king and the three queens that cannot attack the king (i.e., marked with red dashes).
Constraints:
1 <= queens.length < 64
queens[i].length == king.length == 2
0 <= xQueeni, yQueeni, xKing, yKing < 8
- All the given positions are unique.