Example 1:
Input: image = [[1,1,1],[1,1,0],[1,0,1]], sr = 1, sc = 1, color = 2
Output: [[2,2,2],[2,2,0],[2,0,1]]
Explanation:
Example 2:
Input: image = [[0,0,0],[0,0,0]], sr = 0, sc = 0, color = 0
Output: [[0,0,0],[0,0,0]]
Explanation:
You are given an m x n integer grid image where image[r][c] is the pixel color at that position, and three integers sr, sc, and color. Starting from pixel (sr, sc), replace the color of all pixels connected 4-directionally (up, down, left, right) that share the original color with color.
Return the modified image.
All pixels connected to (1,1) that were originally color 1 are recolored to 2.
The starting pixel already has the target color, so the image is returned unchanged.
m == image.lengthn == image[i].length1 <= m, n <= 500 <= image[i][j], color < 2^160 <= sr < m0 <= sc < n