# Tag Archives: factorial

## Check if N is a Factorial Prime

Given a positive integer N, the task is to check if N is a Factorial prime or not. If it is a factorial prime then… Read More »

## Range and Update Sum Queries with Factorial

Given an array arr[] of N integers and number of queries Q. The task is to answer three types of queries. Update [l, r] –… Read More »

## Maximum number with same digit factorial product

Given a string str which represents an integer, the task is to find the largest number without any leading or trailing zeros or ones whose… Read More »

## Arrangement of the characters of a word such that all vowels are at odd places

Given a string ‘S’ containing vowels and consonants of lowercase English alphabets. The task is to find the number of ways in which the characters… Read More »

## Number of ways to arrange a word such that all vowels occur together

Given a word containing vowels and consonants. The task is to find that in how many different ways word can be arranged so that the… Read More »

## Find maximum value of x such that n! % (k^x) = 0

Given two integers and . The task is to find the maximum value of x, such that, n! % (k^x) = 0. Examples: Input :… Read More »

## Number of permutations of a string in which all the occurrences of a given character occurs together

Given a string ‘s’ and a character ‘c’, the task is to find the number of permutations of the string in which all the occurrences… Read More »

## Ways of dividing a group into two halves such that two elements are in different groups

Given 2n girls and randomly divided into two subgroups each containing n girls. The task is to count the number of ways in which groups… Read More »

## Arrangement of words without changing the relative position of vowel and consonants

Given a word of length less than 10, the task is to find a number of ways in which it can be arranged without changing… Read More »

## Seating arrangement of n boys and girls alternatively around a round table

There are n boys and n girls are to be seated around a round table, in a circle. The task is to find number of… Read More »

## Find last two digits of sum of N factorials

Given a number N, the task is to find unit and tens places digit of the first N natural numbers factorials, i.e last last two… Read More »

## Find the unit place digit of sum of N factorials

Given a number N, the task is to find units place digit of the first N natural numbers factorials, i.e. 1!+2!+3!+….N! where N<=10e18. Examples: Input:… Read More »

## Implementation of Wilson Primality test

Given a number N, the task is to check if it is prime or not using Wilson Primality Test. Print ‘1’ isf the number is… Read More »

## Find the total Number of Digits in (N!)N

Given a number N. The task is to find the total Number of Digits in . Examples: Input: N = 3 Output: 3 If N=3,… Read More »

## Find sum of product of number in given series

Given two numbers N and T where, and . The task is to find the value of . Since sum can be large, output it… Read More »