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Problem: Validate Stack Sequences

med
30 min
Try to solve the Validate Stack Sequences problem.

Statement

Given two integer arrays pushed and popped, each with distinct values, determine if this sequence of operations could result from an initially empty stack undergoing a series of push and pop operations. Return true if valid, or false otherwise.

Constraints:

  • 1≤1 \le pushed.length ≤1000\le 1000

  • 0≤0 \le pushed[i] ≤1000\le 1000

  • All the elements of pushed are unique.

  • popped.length is equal to pushed.length

  • popped is a permutation of pushed.

⋮
Tap here to switch tabs
Problem
Submissions

Problem: Validate Stack Sequences

med
30 min
Try to solve the Validate Stack Sequences problem.

Statement

Given two integer arrays pushed and popped, each with distinct values, determine if this sequence of operations could result from an initially empty stack undergoing a series of push and pop operations. Return true if valid, or false otherwise.

Constraints:

  • 1≤1 \le pushed.length ≤1000\le 1000

  • 0≤0 \le pushed[i] ≤1000\le 1000

  • All the elements of pushed are unique.

  • popped.length is equal to pushed.length

  • popped is a permutation of pushed.