Problem · String

Find a Template Across Binary-Tree Leaves

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Problem statement

The text represented by a binary tree is formed by concatenating the values of its leaves from left to right. A leaf value may be a string, a single character, or a space.

In this practice interface, leafValues lists the leaf values in that same left-to-right order. Given leafValues and a string templateText, return true if templateText occurs as a contiguous substring of the tree's text. Otherwise, return false.

The problem statement continues
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Examples

Example 1

leafValues = ["ab","c"," de"]templateText = "c d"return = true

The leaves form abc de. The template c d appears across the boundary between the second and third leaf values.

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Reported in 1 Google interview this week

Unlock this recently reported problem

FastPrep Pro gives you full access to interview problems reported within the last week.

  • Full problem statement and constraints
  • 2 more worked examples, explained
  • Guided hints and editorial
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Free plan — 2 of 2 free unlocks used this week