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local_fire_departmentDevAlpha defeated CodeMaster
D
DevAlpha1842
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timer12:43
CodeMaster
1798
C
</>C++
class Solution {public:vector<int> twoSum(vector<int>& nums, int target) {unordered_map<int, int> m;for(int i = 0; i < nums.size(); i++) {int diff = target - nums[i];if(m.count(diff)) {return { m[diff], i };}m[nums[i]] = i;}}};
</>Python
class Solution:def twoSum(self, nums, target):hash_map = {}for i, n in enumerate(nums):diff = target - nif diff in hash_map:return [hash_map[diff], i]hash_map[n] = i
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Your Submission (O(n²))Suboptimal
for (let i = 0; i < nums.length; i++) {for (let j = i + 1; j < nums.length; j++) {if (nums[i] + nums[j] === target) return [i, j];}}
auto_awesome Suggested (O(n))Optimized
const map = new Map();for (let i = 0; i < nums.length; i++) {const diff = target - nums[i];if (map.has(diff)) return [map.get(diff), i]; map.set(nums[i], i);}
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