Two Pointers

MikeAbout 1 min

Two Pointers

The two pointers technique is a technique used to iterate through a data set, typically an array or a list, in a controlled way. It involves using two pointers, one pointing to the beginning of the data set and the other pointing to the end, and moving them towards each other based on specific conditions. This technique is commonly used to solve problems that involve searching for a specific condition or pattern within a data set, or that require a comparison between different elements in the data set.

The two pointers technique is mainly used for solving problems that have a linear time complexity, it can lead to substantial performance improvements over a brute-force approach. Some common examples of problems that can be solved using this technique include:

Finding the maximum / minimum value in a set of data.
Counting the number of occurrences of a specific element.
Finding the longest substring without repeating characters.
Finding the maximum sum of a sub-array of size k.

Overall, the two pointers technique is a useful approach for solving specific types of problems that involve iterating through a data set in a controlled way, such as in pattern matching, data analysis, and statistics. It allows for an efficient and controlled iteration of a data set, which can lead to improved performance and more accurate results.

two pointers

Exercise

Two Pointers

# Two Pointers

# Exercise

# Remove Element

# Reverse String

# Replace Numbers

# Reverse Words in s String

# Reverse Linked List

# Remove Nth Node From End of List

# Intersection of Two Linked Lists

# Linked List Cycle

# Three Sum

# Four Sum

# Summary

Two Pointers

Exercise

Remove Element

Reverse String

Replace Numbers

Reverse Words in s String

Reverse Linked List

Remove Nth Node From End of List

Intersection of Two Linked Lists

Linked List Cycle

Three Sum

Four Sum

Summary