g0201_0300.s0217_contains_duplicate.Solution Maven / Gradle / Ivy

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Java-based LeetCode algorithm problem solutions, regularly updated

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package g0201_0300.s0217_contains_duplicate;

// #Easy #Top_Interview_Questions #Array #Hash_Table #Sorting #Data_Structure_I_Day_1_Array
// #Programming_Skills_I_Day_11_Containers_and_Libraries #Udemy_Arrays
// #2022_07_02_Time_6_ms_(96.68%)_Space_54.4_MB_(94.38%)

import java.util.HashSet;
import java.util.Set;

public class Solution {
    public boolean containsDuplicate(int[] nums) {
        Set set = new HashSet<>();
        for (int n : nums) {
            if (set.contains(n)) {
                return true;
            }
            set.add(n);
        }
        return false;
    }
}