Given a number N as input. The goal is to find the count of all N digit numbers that have sum Count of all N digit numbers such that num + Rev(num) = 10N − 1num+rev(num)=10N−1For ExampleInputN=4OutputCount of all N digit numbers such that num + Rev(num) = 10N − ... Read More

Given two integers A and B and a number X. The goal is to find the count of values that X can have so that A%X=B. For the above equation if, A==B then infinite values of X are possible, so return −1. If A < B then there would be ... Read More

Given an array of numbers and a stack. All the elements of the array are present inside the stack The goal is to find the count of pop operations required for getting individual array elements.The stack is filled in decreasing order, the first element is highest and top element is ... Read More

Given two integers N and K, the goal is to find the count of numbers such that they follow below conditions −Number=K Where count is the number of prime numbers less than or equal to Number.For ExampleInputN = 5, K = 2OutputCount of numbers < = N whose difference with ... Read More

Given two numbers e and p. The goal is to count the number of ways in which we can divide e elements of a set into p partitions/subsets.For ExampleInpute=4 p=2OutputCount of number of ways to partition a set into k subsets are: 7ExplanationIf elements are: a b c d then ... Read More

Given an array of positive numbers. Each element represents the maximum number of jumps that can be made from that index to reach the end of the array. The goal is to find the number of jumps that can be made from that element to reach the end. If arr[] ... Read More

Given an integer num as input. The goal is to find the number of trailing zeroes in the binary representation of num using bitset.A bitset stores the bits 0s and 1s in it. It is an array of bits.For ExampleInputnum = 10OutputCount of number of trailing zeros in Binary representation ... Read More

Given an integer num as input. The goal is to find the number of trailing zeroes in the product 11 X 22 X 33 X…X numnum.For ExampleInputnum=5OutputCount of number of trailing zeros in (1^1)*(2^2)*(3^3)*(4^4)*.. are: 5ExplanationThe number of 2s and 5s in the product will be: 11 * 22* 33* ... Read More

Given a string str[] containing lowercase alphabets only and an integer value k. The goal is to find the number of possible substrings of str that have exactly k distinct elements.For ExampleInputstr= ”pqr” k=2OutputCount of number of substrings with exactly k distinct characters are: 2ExplanationThe substrings having exactly 2 distinct ... Read More

Given an array arr[] containing positive numbers. The goal is to find subsets of elements of arr[] such that the median of values of the subset is also present in that set.For ExampleInputarr[] = { 1, 2, 3 }OutputCount of number of subsets whose median is also present in the ... Read More