WHAT ARE THE TWO SUMS?
Targets are the motivation behind every task!
Usually, the codes you generate are to meet certain targets or outputs for the user. Similarly, when you give a target to an array and its element, a two-sum problem is formed.
Many times you are asked to print all subsequences of a string or array such that they follow a specific condition. Such as the sum of two elements in these subsequences results in a certain value. This type of problem is called a two sum problem.
This article will guide you throughout the explanation of this problem as well as the process of solving it through different approaches.
To ensure that you understand the concept and solution of this problem, it is important to establish a foundation with the logic behind it.
Let's first discuss the logic behind the two-sum problem.
What are two sum problems?
Two sum problem is a medium difficulty level coding problem. In this problem, the programmer is given a task to scan through an array for a set of elements.
This set must contain only two elements and the sum of these elements must be equal to a predefined target.
This target is given to the programmer in the problem statement itself and hence can change for different problems.
The logic behind this problem is to find two elements that sum up to get a value of a single digit.
This function will return true and the elements if the appropriate elements are found. Else, it will return zero.
For example, let's say the target is 5 and we ask you to scan through an array A such that the sum is 5.
(Let A={1, 2,3,5,6,7,8})
In this example, the function can easily return the set {2, 3} as a sum to form 5.
You must know the searching and conditional operations on arrays to solve this problem accurately.
Let's see how the problem statement of two sums is framed.
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