CERNER Campus Hiring interview questions using HashMap | Math

Problem Statement You are given an integer n. Consider all integers from 1 to n inclusive. Group these numbers according to the sum of their digits. For example: 13 → 1 + 3 = 4 belongs to the group with digit sum 4. After grouping all numbers, find the size of the largest group and return the number of groups having that maximum size. Example 1 Input n = 13 Output 4 Explanation Numbers grouped by digit sum: 1  -> ...