Package g1401_1500.s1441_build_an_array_with_stack_operations

Class Solution

java.lang.Object

g1401_1500.s1441_build_an_array_with_stack_operations.Solution

public class Solution
extends Object

1441 - Build an Array With Stack Operations\. Easy You are given an array `target` and an integer `n`. In each iteration, you will read a number from `list = [1, 2, 3, ..., n]`. Build the `target` array using the following operations: * `"Push"`: Reads a new element from the beginning list, and pushes it in the array. * `"Pop"`: Deletes the last element of the array. * If the target array is already built, stop reading more elements. Return _a list of the operations needed to build_ `target`. The test cases are generated so that the answer is **unique**. **Example 1:** **Input:** target = [1,3], n = 3 **Output:** ["Push","Push","Pop","Push"] **Explanation:** Read number 1 and automatically push in the array -> [1] Read number 2 and automatically push in the array then Pop it -> [1] Read number 3 and automatically push in the array -> [1,3] **Example 2:** **Input:** target = [1,2,3], n = 3 **Output:** ["Push","Push","Push"] **Example 3:** **Input:** target = [1,2], n = 4 **Output:** ["Push","Push"] **Explanation:** You only need to read the first 2 numbers and stop. **Constraints:** * `1 <= target.length <= 100` * `1 <= n <= 100` * `1 <= target[i] <= n` * `target` is strictly increasing.

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
List<String>	buildArray(int[] target, int n)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

buildArray

public List<String> buildArray(int[] target,
 int n)