DSA Solutions

Arrays

Arrays Leetcode Problems List

# Arrays

Build Array From Permutation

Check If N Its Double Exits

Concatenation Of Array

Explanation

# Build Array from Permutation.

Java

Explanation

## Check If N and It's Double Exists - 1346 ```text Given an array arr of integers, check if there exist two indices i and j such that :

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Explanation

## Concatenation Of Array

Java

Explanation

## Number of Good Pairs 1512 ```text Given an array of integers nums, return the number of good pairs. A pair (i, j) is called good if nums[i] == nums[j] and i < j.

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Explanation

## Range Sum Query 2D - Immutable

Java

Explanation

## Range Sum Query - Immutable - 303 [**Read my solution in leetcode**](/dsa/arrays/Running_Sum_of_1d_Array/)

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## Running Sum of 1d Array

Java

Explanation

## Search Insert Position

Java

Explanation

## Shuffle the Array 1470 ```text Given the array nums consisting of 2n elements in the form [x1,x2,...,xn,y1,y2,...,yn]. Return the array in the form [x1,y1,x2,y2,...,xn,yn].

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Number Of Good Pairs

Range Sum Query 2D Immutable

Range Sum Query Immutable

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Find Words That Can Be Formed by Characters

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Greatest Common Divisor of Strings

For two strings <

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Defanging an IP Address

Given a valid (IPv4) IP address</</p>


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      Valid Palindrome
 
A phrase is a palindrome if, after c
    
    
      
      
    
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      Linked List Cycle
 
Given head, the head of a linked list,
    
    
      
      
    
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      Reverse Words in a String
 
Given an input string s
    
    
      
      
    
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      Maximum Product Subarray
 
Given an integer array nums</cod</p>
    
    

      
      
    

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      Kids With the Greatest Number of Candies
 
There
    
    
      
      
    
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      Shuffle String
 
You are given a string s and an integer arra
    
    
      
      
    
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      Goal Parser Interpretation
 
You own a Goal Parser</st</p>
    
    

      
      
    

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      Merge Strings Alternately
 
You are given two strings wor</p>
    
    

      
      
    

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      Remove Nth Node From End of List
 
Given the head</</p>
    
    

      
      
    

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      Happy Number
 
Write an algorithm to determine if a number n is
    
    
      
      
    
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      Remove Linked List Elements
 
Given the head of
    
    
      
      
    
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      Maximum Number of Words Found in Sentences
 
A
    
    
      
      
    
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      Product of Array Except Self
 
Given an integer array n</p>
    
    

      
      
    

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      Valid Anagram
 
Given two strings s and t, return
    
    
      
      
    
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      Longest Substring Without Repeating Characters
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      Increasing Triplet Subsequence
 
Given an integer array <co
    
    
      
      
    
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      Reverse String
 
Write a function that reverses a string. The input string
    
    
      
      
    
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      Reverse Vowels of a String
 
Given a string s, re
    
    
      
      
    
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      Minimum Element After Replacement With Digit Sum
 <img src='https://img.shields.io/badge/Difficulty-Easy-brightgreen' alt='Difficulty: Easy
    
    
      
      
    
  


  
    
  
    
      
      
    
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      Ransom Note
 
Given two strings ransomNote and magazine</c</p>
    
    

      
      
    

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      First Unique Character in a String
 
Given a string <c
    
    
      
      
    
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      Maximum Subarray
 
Given an integer array nums, find the <sp
    
    
      
      
    
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      Can Place Flowers
 
You have a long flowerbed in which some of the plot
    
    
      
      
    
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      Maximum Average Subarray I
 
You are given an integer array <c
    
    
      
      
    
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      Plus One
 
You are given a large integer represented as an inte
    
    
      
      
    
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      # DSA Learning Lab
    
    
      
      
    
  


  
    
  
    
      
      
    
    Running Sum Of 1D Array
    
      



    
    
      
      
    
  


  
    
  
    
      
      
    
    Search Insert Position
    
      



    
    
      
      
    
  


  
    
  
    
      
      
    
    Shuffle The Array
    
      



    
    
      
      
    
  


  
  
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