# LeetCode - 1958. Check if Move is Legal
### 題目網址：https://leetcode.com/problems/check-if-move-is-legal/
###### tags: `LeetCode` `Medium` `模擬` `陣列`

/*
    -LeetCode format-
    Problem: 1958. Check if Move is Legal
    Difficulty: Medium
    
    by Inversionpeter
*/



#define INSIDE(r, c) ( 0 <= r && r < 8 && 0 <= c && c < 8 )

int dr[8] = { -1, -1, -1, 0, 1, 1, 1, 0 }, dc[8] = { -1, 0, 1, 1, 1, 0, -1, -1 };

class Solution {
public:
    bool checkMove(vector<vector<char>>& board, int rMove, int cMove, char color) {
        int newRow, newColumn, length;
        board[rMove][cMove] = color;
        for (int i = 0; i < 8; ++i) {
            length = 2;
            newRow = rMove + dr[i]; newColumn = cMove + dc[i];
            while (INSIDE(newRow, newColumn) && board[newRow][newColumn] != '.' && board[newRow][newColumn] != color) {
                newColumn += dc[i];
                newRow += dr[i];
                ++length;
            }
            if (length >= 3 && INSIDE(newRow, newColumn) && board[newRow][newColumn] == color)
                return true;
        }
        return false;
    }
};