Solving the Two Sum Problem

Introduction

The Two Sum problem is a classic algorithmic problem in computer science. It requires finding two indices in an array that sum up to a specific value. This problem has a wide range of applications, including in data science, machine learning, and finance.

Skills Graph

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Two Sum

Problem

Given an array of integers, find the two indices that sum to a specific value. The function should return the indices as a list.

Requirements

To solve the Two Sum problem, the following requirements must be met:

There is exactly one solution.
There is always a solution.
The array is an array of integers.
The array is not sorted.
Negative values are possible.
The inputs are not necessarily valid.
The solution must fit in memory.

Example Usage

The Two Sum problem can be solved using the following example:

None input -> TypeError
[] -> ValueError
[1, 3, 2, -7, 5], 7 -> [2, 4]

Summary

The Two Sum problem is a fundamental problem in computer science that requires finding two indices in an array that sum up to a specific value. By meeting the requirements and using the example usage, this problem can be solved using Python.