Removing Stars From a String

Category

Stack

Checkbox

Difficulty

Medium

Index

Key Ideas

The key idea to solve this problem is to iterate through the characters of the string and use a stack to remove consecutive star characters.

Problem Number

2390

Problem Summary

The problem number 2390 in the LeetCode-75 curated list involves removing stars from a given string. The task is to remove all occurrences of the '*' character from the string and return the modified string. A key pitfall to watch out for is ensuring that the resulting string maintains its original order and does not contain any extra spaces or characters.

Solution Summary

The best solution to remove stars from a string, as mentioned in the LeetCode-75 curated list, involves using a stack. We can iterate through the string character by character and push each character onto the stack unless it is a star. Whenever we encounter a star, we check the top of the stack. If the top of the stack is not a star, we pop it from the stack as the star and the character cancel each other out. At the end, the remaining characters in the stack will form the string without any stars. This approach has a time complexity of O(n) where n is the length of the string.