Merge branch 'main' into main

BIKRAM-SAHA · Sep 7, 2021 · 993941d · 993941d
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diff --git a/assignments/3-conditionals-loops.md b/assignments/3-conditionals-loops.md
@@ -56,5 +56,5 @@ all.
 23. Perfect Number In Java
 24. Check Leap Year Or Not
 25. Sum Of A Digits Of Number
-26. Kunal is allowed to go out with his friends only on the even days of a given month. Write a program to check if he can go out in the month of August.
+26. Kunal is allowed to go out with his friends only on the even days of a given month. Write a program to count the number of days he can go out in the month of August.
 27. Write a program to print the sum of negative numbers, sum of positive even numbers and the sum of positive odd numbers from a list of numbers (N) entered by the user. The list terminates when the user enters a zero.
diff --git a/assignments/6-searching.md b/assignments/6-searching.md
@@ -40,6 +40,7 @@
 - [Find a Peak Element II](https://leetcode.com/problems/find-a-peak-element-ii/)
 - [Frequency of the Most Frequent Element](https://leetcode.com/problems/frequency-of-the-most-frequent-element/)
 - [Find the Duplicate Number](https://leetcode.com/problems/find-the-duplicate-number/)
+- [4 Sum]{https://leetcode.com/problems/4sum/}
 
 ## Hard
 - [Median of Two Sorted Arrays](https://leetcode.com/problems/median-of-two-sorted-arrays/)

diff --git a/assignments/7-sorting.md b/assignments/7-sorting.md
@@ -34,8 +34,9 @@
 - [Can Make Arithmetic Progression From Sequence](https://leetcode.com/problems/can-make-arithmetic-progression-from-sequence/)
 - [Sort Array by Increasing Frequency](https://leetcode.com/problems/sort-array-by-increasing-frequency/)
 - [Special Array With X Elements Greater Than or Equal X](https://leetcode.com/problems/special-array-with-x-elements-greater-than-or-equal-x/)
-
-
+- [Find all numbers disappeared in an array](https://leetcode.com/problems/find-all-numbers-disappeared-in-an-array/)
+- [Set Mismatch](https://leetcode.com/problems/set-mismatch/)
+- [2Sum](https://leetcode.com/problems/two-sum/)
 
 ## Medium
 - [3Sum](https://leetcode.com/problems/3sum/)
@@ -48,3 +49,8 @@
 - [Sort List](https://leetcode.com/problems/sort-list/)
 - [Largest Number](https://leetcode.com/problems/largest-number/)
 - [Kth Largest Element in an Array](https://leetcode.com/problems/kth-largest-element-in-an-array/)
+- [Find the Duplicate Number](https://leetcode.com/problems/find-the-duplicate-number/)
+- [Find all Duplicates in an array](https://leetcode.com/problems/find-all-duplicates-in-an-array/)
+
+## Hard
+- [First missing Positive](https://leetcode.com/problems/first-missing-positive/)
diff --git a/assignments/8-strings.md b/assignments/8-strings.md
@@ -0,0 +1 @@
+# [Video Link](https://youtu.be/zL1DPZ0Ovlo)