Day 6 of 100 Days LeetCode Challenge

LeetCode Challenge #1. Two Sum

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target.

You may assume that each input would have exactly one solution, and you may not use the same element twice.

You can return the answer in any order.

 

Example 1:

Input: nums = [2,7,11,15], target = 9
Output: [0,1]
Explanation: Because nums[0] + nums[1] == 9, we return [0, 1].

Example 2:

Input: nums = [3,2,4], target = 6
Output: [1,2]

Example 3:

Input: nums = [3,3], target = 6
Output: [0,1]

 

Constraints:

  • 2 <= nums.length <= 104
  • -109 <= nums[i] <= 109
  • -109 <= target <= 109
  • Only one valid answer exists.
Video Solution
Java Solution
				
					class Solution {
    public int[] twoSum(int[] nums, int target) {
        int[] ans = new int[2];

        for(int i=0;i<nums.length;i++){
            for(int j = i+1;j<nums.length;j++){
                if(nums[i]+nums[j]==target){
                    ans[0]=i;
                    ans[1]=j;
                }
            }
        }
          return ans ;
    }
}
				
			
Flowchart of Java Solution
Flowchart of LeetCode Problem 1 - Two Sum

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