Longest Substring without Repeating Characters
Explore how to apply the sliding window technique to find the longest substring with unique characters in a string. This lesson helps you develop an efficient approach to solve substring problems by managing character repetition and understanding constraints, improving your problem-solving skills for coding interviews.
We'll cover the following...
Statement
Given a string, str, return the length of the longest substring without repeating characters.
Constraints:
-
str.length strconsists of English letters, digits, and spaces.
Examples
Understand the problem
Let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps us to check if you’re solving the correct problem:
Longest Substring Without Repeating Characters
What should be the output if the following string is given as an input?
str = “conceptoftheday”
8
6
5
13
Figure it out!
We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.
Try it yourself
Implement your solution in the following coding playground:
int FindLongestSubstring(string str){// Replace this placeholder return statement with your codereturn -1;}