{ "data": { "question": { "questionId": "983", "questionFrontendId": "946", "categoryTitle": "Algorithms", "boundTopicId": 2421, "title": "Validate Stack Sequences", "titleSlug": "validate-stack-sequences", "content": "

Given two integer arrays pushed and popped each with distinct values, return true if this could have been the result of a sequence of push and pop operations on an initially empty stack, or false otherwise.

\n\n

 

\n

Example 1:

\n\n
\nInput: pushed = [1,2,3,4,5], popped = [4,5,3,2,1]\nOutput: true\nExplanation: We might do the following sequence:\npush(1), push(2), push(3), push(4),\npop() -> 4,\npush(5),\npop() -> 5, pop() -> 3, pop() -> 2, pop() -> 1\n
\n\n

Example 2:

\n\n
\nInput: pushed = [1,2,3,4,5], popped = [4,3,5,1,2]\nOutput: false\nExplanation: 1 cannot be popped before 2.\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "验证栈序列", "translatedContent": "

给定 pushed 和 popped 两个序列,每个序列中的 值都不重复,只有当它们可能是在最初空栈上进行的推入 push 和弹出 pop 操作序列的结果时,返回 true;否则,返回 false 。

\n\n

 

\n\n

示例 1:

\n\n
\n输入:pushed = [1,2,3,4,5], popped = [4,5,3,2,1]\n输出:true\n解释:我们可以按以下顺序执行:\npush(1), push(2), push(3), push(4), pop() -> 4,\npush(5), pop() -> 5, pop() -> 3, pop() -> 2, pop() -> 1\n
\n\n

示例 2:

\n\n
\n输入:pushed = [1,2,3,4,5], popped = [4,3,5,1,2]\n输出:false\n解释:1 不能在 2 之前弹出。\n
\n\n

 

\n\n

提示:

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