You are given an integer array target and an integer n.
You have an empty stack with the two following operations:
\n\n"Push": pushes an integer to the top of the stack."Pop": removes the integer on the top of the stack.You also have a stream of the integers in the range [1, n].
Use the two stack operations to make the numbers in the stack (from the bottom to the top) equal to target. You should follow the following rules:
target, do not read new integers from the stream and do not do more operations on the stack.Return the stack operations needed to build target following the mentioned rules. If there are multiple valid answers, return any of them.
\n
Example 1:
\n\n\nInput: target = [1,3], n = 3\nOutput: ["Push","Push","Pop","Push"]\nExplanation: Initially the stack s is empty. The last element is the top of the stack.\nRead 1 from the stream and push it to the stack. s = [1].\nRead 2 from the stream and push it to the stack. s = [1,2].\nPop the integer on the top of the stack. s = [1].\nRead 3 from the stream and push it to the stack. s = [1,3].\n\n\n
Example 2:
\n\n\nInput: target = [1,2,3], n = 3\nOutput: ["Push","Push","Push"]\nExplanation: Initially the stack s is empty. The last element is the top of the stack.\nRead 1 from the stream and push it to the stack. s = [1].\nRead 2 from the stream and push it to the stack. s = [1,2].\nRead 3 from the stream and push it to the stack. s = [1,2,3].\n\n\n
Example 3:
\n\n\nInput: target = [1,2], n = 4\nOutput: ["Push","Push"]\nExplanation: Initially the stack s is empty. The last element is the top of the stack.\nRead 1 from the stream and push it to the stack. s = [1].\nRead 2 from the stream and push it to the stack. s = [1,2].\nSince the stack (from the bottom to the top) is equal to target, we stop the stack operations.\nThe answers that read integer 3 from the stream are not accepted.\n\n\n
\n
Constraints:
\n\n1 <= target.length <= 1001 <= n <= 1001 <= target[i] <= ntarget is strictly increasing.给你一个数组 target 和一个整数 n。每次迭代，需要从 list = { 1 , 2 , 3 ..., n } 中依次读取一个数字。
请使用下述操作来构建目标数组 target ：
\"Push\"：从 list 中读取一个新元素， 并将其推入数组中。\"Pop\"：删除数组中的最后一个元素。题目数据保证目标数组严格递增，并且只包含 1 到 n 之间的数字。
请返回构建目标数组所用的操作序列。如果存在多个可行方案，返回任一即可。
\n\n\n\n
示例 1：
\n\n\n输入：target = [1,3], n = 3\n输出：[\"Push\",\"Push\",\"Pop\",\"Push\"]\n解释： \n读取 1 并自动推入数组 -> [1]\n读取 2 并自动推入数组，然后删除它 -> [1]\n读取 3 并自动推入数组 -> [1,3]\n\n\n
示例 2：
\n\n\n输入：target = [1,2,3], n = 3\n输出：[\"Push\",\"Push\",\"Push\"]\n\n\n
示例 3：
\n\n\n输入：target = [1,2], n = 4\n输出：[\"Push\",\"Push\"]\n解释：只需要读取前 2 个数字就可以停止。\n\n\n
\n\n
提示：
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