Flood Fill 
Desc:
二维格点,用数字代表颜色,选定一个点(sr,sc)进行染色,和该点直接相连的同色点且都会被染成新颜色,求最后的二维矩阵。
很简单不知道为什么我要写一篇blog(表现的自己很努力?
My_Code:
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   | class Solution { public:     vector<vector<int>> floodFill(vector<vector<int>>& image, int sr, int sc, int newColor) {         int oldColor = image[sr][sc];         if (oldColor == newColor) return image;         queue<pair<int, int>> queue;         queue.push(make_pair(sr, sc));         int n = image.size();         int m = image[0].size();         while (!queue.empty()) {             int row = queue.front().first;             int column = queue.front().second;             queue.pop();             if (image[row][column] == oldColor) {                 image[row][column] = newColor;                 if (row != 0) queue.push(std::make_pair(row-1, column));                 if (row != n-1) queue.push(std::make_pair(row+1, column));                 if (column != 0) queue.push(std::make_pair(row, column-1));                 if (column != m-1) queue.push(std::make_pair(row, column+1));             }          }         return image;     } };
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