A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand o ...
題目: A d grid map ofmrows andncolumns is initially filled with water. We may perform anaddLandoperation which turns the water at position row, col into a land. Given a list of positions to operate,coun ...
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A 2d grid map of m rows and n columns is initially filled with water. We may perform an addLand o ...
Problem Description: A 2d grid map of m rows and n columns is initially filled with water. We may p ...
Number of Islands II Given a n,m which means the row and column of the 2D matrix and an array of pair A( size k). Originally, the 2D matrix is all ...
Union Find Princeton's lecture note on Union Find in Algorithms and Data Structures It is a ...
Given a non-empty 2D array grid of 0's and 1's, an island is a group of 1's (representing land) c ...
Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting ...
DFS的Flood Fill方法, 不使用額外visited數組,但是用‘1’變成‘2’表示visited的方法 復雜度 時間 O(NM) 空間 O(max(N,M)) 遞歸棧空間 ...
題目: 島嶼的個數 給一個01矩陣,求不同的島嶼的個數。 0代表海,1代表島,如果兩個1相鄰,那么這兩個1屬於同一個島。我們只考慮上下左右為相鄰。 樣例 ...