Question : Given an m*n 2D sorted matrix of integers, write a program to find if the given integer exists in the matrix.The matrix has the properties below: Approach #1 By removing row and col in each comparisons . Starting from the top right of matrix, move towards the bottom left in search of the […]
How to search an element in Sorted Integer matrix ? Read More »
Question: Find the missing number in first n Natural numbers…
Find missing number from first N natural numbers. Read More »
[Question]: In a given two sorted array find union elements. Output should be sorted. For example : arr1[] = {1,2,3,4,5} arr2[] = {2,3,4,4,5} Output: {1,2,3,4,5}Approach #1: Use Dictionary / Hashset & after it sort the array which SC: O(m+n) TC: O( (m+n)log(m+n) ) Approach #2: Two pointer approach: use two pointer i & j & fill the
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[Question]: Reverse a string with O(1) extra memory. The input string is given as an array of characters like [“C”, “A”, “R”] So here we have used one for loop which iterates half of array & swapping last with first
How to reverse String in swift? Read More »
Question: – if on given matrix any element is zero set entire row & column to zero [Link] Approach #2 Here we find the rows & cols which is zero & then iterate over matrix & make that rows and cols as zero
Set Matrix Zeroes in swift Read More »
