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duel / room-92a8 · two-sum

Live

Alice1524 elo

04:32Live 1v1

1468 eloBob

1. Two Sum

Medium

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

Example 1

Input: nums = [2,7,11,15], target = 9

Output: [0,1]

nums[0] + nums[1] == 9, so return [0, 1].

Testcases

Match state synced — both players see the same problem.

saved

1from typing import List

3class Solution:

4 def twoSum(self, nums: List[int], target: int) -> List[int]:

5 lookup = {}

6 for i, num in enumerate(nums):

7 if target - num in lookup:

8 return [lookup[target - num], i]

9 lookup[num] = i

10 return []

Accepted36 ms runtime14.2 MB memory

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