## Count of integers from the range [0, N] whose digit sum is a multiple of K

Given two integers N and K, the task is to calculate the number of integers in the range [0, N] whose digit sum is a… Read More »

Given two integers N and K, the task is to calculate the number of integers in the range [0, N] whose digit sum is a… Read More »

Given two integers N and K, the task is to find the count of all the integer in base K which satisfy the following conditions:… Read More »

Given two integers L and R denoting a range [L, R]. The task is to find the total count of numbers in the given range… Read More »

Given n, find count of n digit Stepping numbers. A number is called stepping number if all adjacent digits have an absolute difference of 1.… Read More »

Given an array arr[] of N integers, the task is to find the length of the longest sub-sequence such that adjacent elements of the sub-sequence… Read More »

Given a range [L, R]. The task is to count the numbers in the range having difference between the sum of digits at even position… Read More »

Given a range [L, R] and two positive integers N and M. The task is to count the numbers in the range containing only non-zero… Read More »

Given a range represented by two positive integers l and r and two integers d and m. Find the count of numbers lying in the… Read More »

Given a range represented by two positive integers L and R and a positive integer K. Find the count of numbers in the range where… Read More »

Given two positive integers L and R which represents a range and two more positive integers d and K. The task is to find the… Read More »

Given a range represented by two positive integers L and R. Find the count of numbers in the range where the first digit is equal… Read More »

Prerequisite : How to solve a Dynamic Programming Problem ? There are many types of problems that ask to count the number of integers ‘x‘… Read More »