Given two integers N and M, the task is count the total words of M character length formed by the given N distinct characters such… Read More

# Tag Archives: factorial

Given an integer N, the task is to find the MDAS factorial.The general factorial of a no. N is given by: Factorial(N) = (N)*(N-1)*(N-2)*(N-3)*(N-4)*(N-5)*(N-6)*(N-7)- –… Read More

Given an array with positive integers. The task is to find the factorial of all the array elements. Note: As the numbers would be very large,… Read More

Given an array arr[] of N integers. The task is to find the sum of factorials of each element of the array. Examples: Input: arr[]… Read More

Given two integers K and N, the task is to count the number of ways to arrange K different objects taking N objects at a… Read More

Given an array arr[] which contains the frequency of the digits (0-9), the task is to find the count of numbers possible using each digit… Read More

Given an integer N, the task is to check whether N divides the sum of the factorials of its digits. Examples: Input: N = 19 Output:… Read More

Given a number ‘N’. Check whether factorial of ‘N’ is divisible by the sum of first ‘N’ natural numbers or not? If divisibility is possible,… Read More

Given an integer N, the task is to find whether fact(N) is divisible by sum(N) where fact(N) is the factorial of N and sum(N) =… Read More

Given the NxN grid of horizontal and vertical roads. The task is to find out the number of ways that the person can go from… Read More

Given an integer Y, find the smallest number X such that X! contains at least Y trailing zeros. Prerequisites – Count trailing zeroes in factorial of… Read More

Given two numbers n and r, the task is to find the value of nPr. nPr represents n permutation r which is calculated as n!/(n-k)!. Permutation… Read More

Given two integer N and M, the task is to find the number of distinct numbers having N 0’s and M 1’s with no leading… Read More

Given an array with N positive integers. Find the GCD of factorials of all elements of array.Examples: Input : arr[] = {3, 4, 8, 6}… Read More

Given two positive integers B and N. The task is to find the number of trailing zeroes in b-ary (base B) representation of N! (factorial… Read More