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Minimum Nested Depth Solution

Problem Statement

Given a nested structure represented as a Trie, find the minimum depth of the nested structure. The depth is defined as the number of edges from the root to the deepest node. Implement a solution to track the minimum depth in O(1) time using a stack.

Example 1

Input

[[5],[4,1],[8,3,9],[2,6],[0],[7]]

Output

Explanation: The minimum depth of the nested structure is 3, which corresponds to the path from the root node 5 to the leaf node 0.

Constraints

1 <= number of nodes <= 1000
0 <= node value <= 1000

Minimum Nested Depth Solution

Problem Statement

Input

Output

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