https://leetcode-cn.com/problems/build-an-array-with-stack-operations/
/*
* @Author: Goog Tech
* @Date: 2020-09-01 20:10:12
* @LastEditTime: 2020-09-01 20:10:32
* @Description: https://leetcode-cn.com/problems/build-an-array-with-stack-operations/
* @FilePath: \leetcode-googtech\#1441. Build an Array With Stack Operations\Solution.java
* @WebSite: https://algorithm.show/
*/
class Solution {
public List<String> buildArray(int[] target, int n) {
// 初始化结果列表
List<String> result = new LinkedList<>();
// 初始化数组下标
int i = 0;
// 遍历 1 到 N 之间所有的数值
for(int j = 1; j <= n; j++) {
// 若当前数组下标与数组长度值相同则跳出并结束循环
if(i == target.length) {
break;
}
// 若当前下标所指的数组元素与当前 j 值相同,
// 则将 Push 字符存储到结果列表中,并向后移动数组元素指针
if(target[i] == j) {
result.add("Push");
i++;
// 反之则说明数组中缺失当前数值 j
}else {
result.add("Push");
result.add("Pop");
}
}
// 返回结果列表
return result;
}
}
'''
Author: Goog Tech
Date: 2020-09-01 20:10:17
LastEditTime: 2020-09-01 20:10:39
Description: https://leetcode-cn.com/problems/build-an-array-with-stack-operations/
FilePath: \leetcode-googtech\#1441. Build an Array With Stack Operations\Solution.py
WebSite: https://algorithm.show/
'''
class Solution(object):
def buildArray(self, target, n):
"""
:type target: List[int]
:type n: int
:rtype: List[str]
"""
# 初始化结果列表
result = []
# 遍历 1 到 n 之间所有的数值
for num in range(1, target[-1] + 1):
# 将 Push 字符存储到结果列表中
result.append('Push')
# 若当前数值 num 在数组 target 不存在,则说明数组中缺失数值 num
if num not in target:
# 进而将 Pop 字符添加到结果列表中
result.append('Pop')
# 返回结果列表
return result