Cheapest route
Medium · Advanced graphs · Original CodeClash problem
Input has n and weighted undirected edges [u,v,w], w>0. Return shortest cost from 0 to n-1, or -1.
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: 0
Example 2
Input: {"n":2,"edges":[]}
Output: -1
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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