Leetcode Problem 684. Redundant Connection

684. Redundant Connection

Leetcode Solutions

Approach #: Union-Find [Accepted]

  1. Initialize an array parent to represent each node's parent, with each node initially being its own parent.
  2. Define a find function that uses path compression to find the root parent of a node.
  3. Iterate through each edge in the graph.
  4. For each edge (u, v), apply the find function to both u and v.
  5. If find(u) equals find(v), then a cycle is detected, and the current edge is the redundant one.
  6. Otherwise, perform the union operation to merge the subsets containing u and v.
  7. Return the last edge that created a cycle.
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Approach #: DFS [Accepted]

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