number-digits

612+ posts

Count Substrings with Frequencies Less than Maximum Digit

Last Updated: 31 December 2023

Given a string S of length N. Then your task is to find the count of substrings such that, the frequency of each digit in that substring must be less than the maximum digi...read more

Geeks Premier League 2023

Maximize the number formed by replacing adjacent digits with their sum

Last Updated: 07 November 2022

Given a number N without leading 0s, the task is to find the maximum number formed after replacing any two adjacent digits by their sum only once.Examples:Input: 10057Outp...read more

Find the maximum number formed by swapping digits of same parity

Last Updated: 01 July 2022

Given a number N, the task is to maximize this number by following the given conditions:The odd digit of the number can only be swapped by any odd digit present in the giv...read more

Largest integer divisible by 9 after inserting any digit in N

Last Updated: 16 June 2022

Given a large integer N, the task is to find the largest possible integer which is divisible by 9 after inserting exactly one digit from 0 to 9 anywhere in the N.Note: Lea...read more

Count of Integers in given range consisting only given set of Digits

Last Updated: 23 July 2025

Given two integers L and R, and an array arr[] containing single digit integers, the task is to find all the integers in the range [L, R) consisting of digits from given a...read more

DSA

number-digits

Count of subarrays with digit sum equals to X

Last Updated: 23 July 2025

Given an array arr[] of length N and integer X, the task is to count no of subarrays having digit sum equal to X.Examples:Input: arr[] = {10, 5, 13, 20, 9}, X = 6Output: 2...read more

Mathematical

Geeks Premier League

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Encode Strings in form of "xAyB" where x and y and based on count of digits

Last Updated: 13 July 2023

Given two numeric string N and M, the task is to encode the given strings in the form "xAyB", where:x is the count of digits that are same in N and M and are present on sa...read more

Count of digits in N and M that are same but present on different indices

Last Updated: 09 February 2022

Given two numbers N and M, the task is to find the count of digits in N and M that are the same but present on different indices.Examples:Input: N = 123, M = 321Output: 2E...read more

Mathematical

DSA

number-digits

Count of digits in N and M that are same and are present on the same indices

Last Updated: 12 December 2022

Given two number N and M, the task is to find the count of digits in N and M that are the same and are present on the same indices.Examples:Input: N = 123, M = 321Output: ...read more

Mathematical

DSA

number-digits

Find two numbers A and B of X and Y digits respectively with GCD having Z digits

Last Updated: 23 July 2025

Given three positive integers X, Y, and Z. The task is to find two numbers A and B of X and Y digits respectively with their GCD having Z digits. where Z ≤ min(X, Y). If t...read more

Find all N digit integers with sequential digits

Last Updated: 22 February 2022

Given an integer N, the task is to find all N digit integers with sequential digitsExamples:Input: N = 4Output: {1234, 2345, 3456, 4567, 5678, 6789}Explanation: All 4 digi...read more

Maximum count of digits that can be removed such that remaining integer is consonant

Last Updated: 23 July 2025

Given a string S representing an N digit integer, the task is to find the maximum number of digits that can be removed such that the remaining digits from a consonant inte...read more

Minimize the number formed by replacing adjacent pair of digits with their sum

Last Updated: 23 July 2025

Given string s denoting a number. The task is to find the minimum number that can be formed after replacing two consecutive digits of s by their sum.Examples:Input: s = "1...read more

Reverse digits of an integer with overflow handled | Set 2

Last Updated: 23 July 2025

Given a 32-bit integer N. The task is to reverse N, if the reversed integer overflows, print -1 as the output.ExamplesInput: N = 123Output: 321Input: N = -123Output: -321I...read more

Find all numbers in range whose digits are increasing decreasing alternatively

Last Updated: 01 February 2022

Given integers L and R, find all numbers in range L to R whose digits are increasing-decreasing alternatively i.e. if the digits in the current number are d1, d2, d3, d4, ...read more

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