Coding With Fun
Home Docker Django Node.js Articles Python pip guide FAQ Policy

How to do two sum, 3 sum closest in java?


Asked by Mordechai Reid on Dec 12, 2021 Java



The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than index2. Please note that your returned answers (both index1 and index2) are not zero-based. You may assume that each input would have exactly one solution.
Accordingly,
Two Number Sum Problem solution in Java METHOD 1. Naive approach: Use two for loops The naive approach is to just use two nested for loops and check if the sum of any two elements in the array is equal to the given target.
Just so, The sum () method of Java Integer class numerically returns the sum of its arguments specified by a user. This method adds two integers together as per the + operator. It can be overloaded and accepts the arguments in int, double, float and long.
In addition,
Maintain a Prefix sum array . Also maintain indexes in the prefix sum array. Sort the prefix sum array on the basis of sum. Find the two elements in a prefix sum array with minimum difference. Return indexes of pre_sum with minimum difference. Subarray with (lower_index+1, upper_index) will have the sum closest to 0.
In respect to this,
Understand that you'd need two inputs/ parameters from the user for this program: the two numbers. Write the code. Finding the sum of two numbers means the simple addition of both the numbers. Create a separate variable to store the value of the sum. This can be of the type int.