Add links for questions

Author: PallavJain01

README.md

@@ -4,38 +4,38 @@ These questions test your ability to apply various techniques such as hashing, s
 
 ## Foundation Questions ❤️
 | Array Questions | Practice Link | Code Solutions | Video Solutions | HINT
-| ------------- | :-------------: | :-------------: | :---------: |:---------: |
-Wave Array
-Subarray with given sum
-Missing number in array
-Rotate Array | [Solve](https://leetcode.com/problems/rotate-array/) | [CODE](#) | [Video](https://youtu.be/0OTPqrEd74g) 
-Find duplicates in an array
-Remove all occurrences of Given Number | [Solve](https://leetcode.com/problems/remove-element/)
-Remove Duplicates from Sorted Array | [Solve](https://leetcode.com/problems/remove-duplicates-from-sorted-array/)
-Move all zeroes to end of array
-Sort an array of 0s, 1s and 2s | [Solve](https://leetcode.com/problems/sort-colors/submissions/) , [Solve](https://practice.geeksforgeeks.org/problems/sort-an-array-of-0s-1s-and-2s4231/1/) | [Code](https://github.com/CodingWallah/Arrays-DSA-Coding-Questions/blob/main/Sort%20Array%200-1-2.md) | [Video](#)
-Intersection of two arrays
-Reverse an array
-Swapping Elements in an array
-Find Min and Max in an Array
+-|-|-|-|-
+Wave Array| [CodingNinjas](https://www.codingninjas.com/codestudio/problems/sort-an-array-in-wave-form_975285), [GeeksForGeeks](https://practice.geeksforgeeks.org/problems/wave-array-1587115621/1)
+Subarray with given sum| [Leetcode](https://leetcode.com/problems/subarray-sum-equals-k/), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/subarray-with-given-sum_842487), [GeeksForGeeks](https://practice.geeksforgeeks.org/problems/subarray-with-given-sum-1587115621/1?utm_source=geeksforgeeks) |
+Missing number in array| [Leetcode](https://leetcode.com/problems/missing-number/), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/missing-number_6680467), [GeeksForGeeks](https://practice.geeksforgeeks.org/problems/missing-number-in-array1416/1?utm_source=geeksforgeeks) |
+Rotate Array | [Leetcode](https://leetcode.com/problems/rotate-array/), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/rotate-array_1230543), [GeeksForGeeks](https://practice.geeksforgeeks.org/problems/rotate-array-by-n-elements-1587115621/1) |  | [Video](https://youtu.be/0OTPqrEd74g) 
+Find duplicates in an array| [Leetcode](https://leetcode.com/problems/find-all-duplicates-in-an-array/) | 
+Remove all occurrences of Given Number | [Leetcode](https://leetcode.com/problems/remove-element/)
+Remove Duplicates from Sorted Array | [Leetcode](https://leetcode.com/problems/remove-duplicates-from-sorted-array/)
+Move all zeroes to end of array| [Leetcode](https://leetcode.com/problems/move-zeroes/)
+Sort an array of 0s, 1s and 2s | [Leetcode](https://leetcode.com/problems/sort-colors/submissions/) , [GeeksForGeeks](https://practice.geeksforgeeks.org/problems/sort-an-array-of-0s-1s-and-2s4231/1/) | [Code](https://github.com/CodingWallah/Arrays-DSA-Coding-Questions/blob/main/Sort%20Array%200-1-2.md) | 
+Intersection of two arrays| [Leetcode](https://leetcode.com/problems/intersection-of-two-arrays/)
+Reverse an array| [Leetcode](https://leetcode.com/problems/reverse-string/)
+Swapping Elements in an array|
+Find Min and Max in an Array| [GeeksForGeeks](https://practice.geeksforgeeks.org/problems/max-min/1?utm_source=geeksforgeeks)
 
 ## Medium Questions ❤️‍🔥
 | Array Questions | Practice Link | Code Solutions | Video Solutions | HINT
 | ------------- | :-------------: | :-------------: | :---------: |:---------: |
-Valid Moutain Array | [Solve](https://leetcode.com/problems/valid-mountain-array/) | [Code](#) | [Video](https://youtu.be/tVDTjm_fYbQ) | 2 pointers
-Majority Element | [Solve](https://leetcode.com/problems/majority-element/) | [Code](#) | [Video](https://www.youtube.com/watch?v=cLE1J34pYUo) | Sorting / or Boyer-Moore Voting Algorithm
-Kth largest/smallest element in an array | [Solve](https://leetcode.com/problems/kth-largest-element-in-an-array/) | [Code](https://github.com/CodingWallah/Arrays-DSA-Coding-Questions/blob/main/kth-largest-smallest.md) | [Video](#) | soritng / priority q
-Trapping Rain Water
-Coin Change
-Stock span problem
-Merge k Sorted Arrays
-Next Permutation | [Solve](https://leetcode.com/problems/next-permutation) | [Code](#) | [Video](#) | 2 poniters 
-Kadane's Algorithm
+Valid Moutain Array | [Leetcode](https://leetcode.com/problems/valid-mountain-array/) | [Code](#) | [Video](https://youtu.be/tVDTjm_fYbQ) | 2 pointers
+Majority Element | [Leetcode](https://leetcode.com/problems/majority-element/) | [Code](#) | [Video](https://www.youtube.com/watch?v=cLE1J34pYUo) | Sorting / or Boyer-Moore Voting Algorithm
+Kth largest/smallest element in an array | [Leetcode](https://leetcode.com/problems/kth-largest-element-in-an-array/) | [Code](https://github.com/CodingWallah/Arrays-DSA-Coding-Questions/blob/main/kth-largest-smallest.md) | [Video](#) | soritng / priority q
+Trapping Rain Water|[Leetcode](https://leetcode.com/problems/trapping-rain-water/), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/trapping-rainwater_630519)
+Coin Change|[Leetcode](https://leetcode.com/problems/coin-change/), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/coin-change-finite-supply_2545103)
+Stock span problem|[Leetcode](https://leetcode.com/problems/online-stock-span/), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/stock-span_5243295)
+Merge k Sorted Arrays|[Leetcode](https://leetcode.com/problems/merge-k-sorted-lists/), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/merge-k-sorted-arrays_975379)
+Next Permutation |[Leetcode](https://leetcode.com/problems/next-permutation), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/next-permutaion_893046) | [Code](#) | [Video](#) | 2 poniters 
+Kadane's Algorithm|[Leetcode](https://leetcode.com/problems/maximum-subarray/description/), [CodingNinjas](https://www.codingninjas.com/codestudio/problems/maximum-subarray_893296)
 
 
 
 ## Hard Questions 💔
 | Array Questions | Practice Link | Code Solutions | Video Solutions | HINT
-| ------------- | :-------------: | :-------------: | :---------: |:---------: |
-Merge Without Extra Space
-Next Smallest Palindrome
+-|-|-|-|-
+Merge Without Extra Space|[GeeksForGeeks](https://practice.geeksforgeeks.org/problems/merge-two-sorted-arrays-1587115620/1)
+Next Smallest Palindrome|[GeeksForGeeks](https://practice.geeksforgeeks.org/problems/next-smallest-palindrome4740/1?utm_source=geeksforgeeks)