Given an integer N, the task is to find the number of trailing zeroes in the base 16 representation of the factorial of N.Examples: Input:… Read More

# Tag Archives: factorial

Given three positive integers N, A and B. The task is to count the numbers of length N containing only digits A and B and… Read More

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

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

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

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

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

Given two integers and . The task is to find the maximum value of x, such that, n! % (k^x) = 0.Examples: Input : n = 5,… 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

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

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

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

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

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: n… Read More

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