The problem is rated 1600 , and is based on graph theory and Spanning Trees.
The problem can be solved using simple observation and BFS with time complexity O(N+M).
The same problem can also be solved using DSU , but we will be solving this using BFS.
If you are beginner and want to study graph theory in detail , here are playlist i created for that
Graph Theory Part 1 :
Graph Theory Part 2 :
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Thank you guys for watching and keep coding.
CodeNCdode
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