Connected districts
Medium · Graphs · Original CodeClash problem
Input has n vertices labeled 0..n-1 and edges, an undirected simple graph. Return number of connected components.
Input and output
One JSON value on a single line, with the fields described above. Read it using json.loads(input()).
One compact JSON value. Use print(json.dumps(answer, separators=(",", ":"))). Booleans must be JSON true/false. Arrays retain the stated order.
Examples
Example 1
Input: {"n":1,"edges":[]}
Output: 1
Example 2
Input: {"n":2,"edges":[]}
Output: 2
Constraints
- Array and string lengths are at most 200 unless stated otherwise.
- Integers have absolute value at most 10,000 unless stated otherwise.
- All inputs satisfy the stated preconditions.
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