Connecting Cities With Minimum Cost

Implement solve for Connecting Cities With Minimum Cost. Return the required output for the provided arguments.

Examples
Input: [3,[[1,2,5],[1,3,6],[2,3,1]]]
Output: 6
Hints

Connecting Cities With Minimum Cost

Implement `solve` for **Connecting Cities With Minimum Cost**. Return the required output for the provided arguments.