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217. Contains Duplicate. Easy. Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct. Example 1: Input: nums = [1,2,3,1] Output: true. Example 2: Input: nums = [1,2,3,4] Output: false. Example 3: Input: nums = [1,1,1,3,3,4,3,2,4,2] Output: true. Constraints:
Jul 4, 2016 · Description. Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element is distinct. Example 1: Input: nums = [1,2,3,1] Output: true. Example 2: Input: nums = [1,2,3,4] Output: false. Example 3: Input: nums = [1,1,1,3,3,4,3,2,4,2] Output: true. Constraints:
class Solution { public: bool containsDuplicate(vector<int>& nums) { unordered_set<int> seen; for (const int num : nums) if (!seen.insert(num).second) return true; return false; } }; LeetCode Solutions in C++20, Java, Python, MySQL, and TypeScript.
217 Contains Duplicate - Easy Problem: Given an integer array nums , return true if any value appears at least twice in the array, and return false if every element is distinct.
In-depth solution and explanation for LeetCode 217. Contains Duplicate in Python, Java, C++ and more. Intuitions, example walk through, and complexity analysis.
Feb 23, 2024 · A beginner-friendly explanation of my solution to LeetCode problem #217 Intuition To identify duplicates in a collection efficiently, a set is an ideal data structure due to its inherent...
Contains Duplicate - LeetCode. Can you solve this real interview question? Contains Duplicate - Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview.
