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Merged
merged 9 commits into from
Sep 12, 2023
Merged

add two sum problem #4364

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a039b51
add two sum problem
BamaCharanChhandogi Sep 10, 2023
4fb3e7d
linter solved
BamaCharanChhandogi Sep 10, 2023
b40940e
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BamaCharanChhandogi Sep 10, 2023
241136c
improve code
BamaCharanChhandogi Sep 10, 2023
4569fdd
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BamaCharanChhandogi Sep 10, 2023
231db99
improve code
BamaCharanChhandogi Sep 10, 2023
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mini linter solved
BamaCharanChhandogi Sep 10, 2023
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BamaCharanChhandogi Sep 11, 2023
b767cdd
Merge branch 'master' into Twosum
siriak Sep 12, 2023
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improve code
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@BamaCharanChhandogi
BamaCharanChhandogi committed Sep 10, 2023
commit 231db9977d3932ae8ac801de18f85fc2789b95b5
8 changes: 5 additions & 3 deletions src/main/java/com/thealgorithms/misc/TwoSumProblem.java
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Original file line number Diff line number Diff line change
@@ -1,8 +1,10 @@
package com.thealgorithms.misc;

import java.util.*;
import java.util.HashMap;

public class TwoSumProblem {
public final class TwoSumProblem {
private TwoSumProblem() {
}
/**
* The function "twoSum" takes an array of integers and a target integer as input, and returns an
* array of two indices where the corresponding elements in the input array add up to the target.
Expand All @@ -11,7 +13,7 @@ public class TwoSumProblem {
* @return The method `twoSum` returns an array of integers.
* @author Bama Charan Chhandogi (https://github.com/BamaCharanChhandogi)
*/
public static int[] twoSum(int[] arr, int target) {
public static int[] twoSum(final int[] arr, final int target) {
HashMap<Integer, Integer> map = new HashMap<>();
for (int i = 0; i < arr.length; i++) {
int rem = target - arr[i];
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8 changes: 8 additions & 0 deletions src/test/java/com/thealgorithms/misc/TwoSumProblemTest.java
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Expand Up @@ -43,6 +43,14 @@ void testTwoSumMultipleSolutions() {
int[] result = TwoSumProblem.twoSum(nums, target);
assertArrayEquals(expected, result);
}
@Test
void testTwoSumMultipleSolution() {
int[] nums = {3, 4, 3, 3};
int target = 6;
int[] expected = {0, 2}; // nums[0] + nums[2] = 3 + 3 = 6
int[] result = TwoSumProblem.twoSum(nums, target);
assertArrayEquals(expected, result);
}

@Test
void testTwoSumNegativeNumbers() {
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