Number System Archives

Excel Sheet Column Title Leetcode Solution

Problem Statement In this problem a positive integer is given which represents a column number of an Excel sheet, we have to return its corresponding column title as appear in an Excel sheet. Example #1 28 “AB” #2 701 “ZY” Approach This problem is the reverse of the problem in …

Excel Sheet Column Number Leetcode Solution

Problem Statement In this problem we are given a column title as appear in an Excel sheet, we have to return the column number that corresponds to that column title in Excel as shown below. Example #1 “AB” 28 #2 “ZY” 701 Approach To find column number for a particular …

Count Primes in Ranges

Problem Statement The problem “Count Primes in Ranges” states that you are given a range [left, right], where 0<=left<=right<=10000. The problem statement asks to find out the total number of prime numbers within the range. Assuming that there will be a large number of queries. Example left: 4 right:10 2 …