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Leetcode Problem 990. Satisfiability of Equality Equations
990. Satisfiability of Equality Equations
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Approach: Depth-first Search (DFS)
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Build an undirected graph where each node represents a variable and each edge represents an
==
relationship.
Initialize all variables as uncolored.
Perform DFS on each uncolored node, coloring all reachable nodes with a unique color for each connected component.
After all nodes are colored, iterate through the
!=
equations.
If any
!=
equation has both variables with the same color, return
false
as they are in the same connected component.
If no contradictions are found, return
true
.
Approach: Union-Find
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