LeetCode Clone Graph: DFS with a Hash Map
LeetCode 133 walked through — why a hash map from original to copy is the entire idea, plus the BFS variant for stack-limited environments.
·5 min read · #dsa#leetcode#graphs
#dfs
3 posts.
LeetCode Pacific Atlantic Water Flow
LeetCode 417 explained — why you should flood from the oceans inward, not from each cell outward, and how the intersection gives the answer.
·6 min read · #dsa#leetcode#graphs
LeetCode Path Sum: DFS With a Running Total
LeetCode 112 in detail — the DFS-with-decrement trick, why the leaf condition is the whole problem, and the variants that build on it.
·5 min read · #dsa#leetcode#trees