Two Sum

Difficulty: Easy | Category: Array | Asked at: Google, Amazon, Meta | Platform: Unfoldd Arena

# 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. --- ### Examples **Example 1:** ```text Input: nums = [2,7,11,15], target = 9 Output: [0,1] Explanation: Because nums[0] + nums[1] == 9, we return [0, 1]. ``` **Example 2:** ```text Input: nums = [3,2,4], target = 6 Output: [1,2] ``` **Example 3:** ```text Input: nums = [3,3], target = 6 Output: [0,1] ``` --- ### Constraints | Property | Limit | | :--- | :--- | | **Array Length** | `2 **Note:** Only one valid answer exists.

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Two Sum

Easy

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.

Examples

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

PropertyLimit
Array Length
2 <= nums.length <= 10^4
Element Value
-10^9 <= nums[i] <= 10^9
Target Value
-10^9 <= target <= 10^9

Note: Only one valid answer exists.

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