## Number of unique permutations starting with 1 of a Binary String

Given a binary string composed of 0’s and 1’s. The task is to find the number of unique permutation of the string which starts with… Read More »

## Check if two arrays are permutations of each other using Mathematical Operation

Given two unsorted arrays of same size where arr[i] >= 0 for all i, the task is to check if two arrays are permutations of… Read More »

## Minimum length of string having all permutation of given string.

Given a string where, . Assume that all the characters in are unique. The task is to compute the minimum length of a string which… Read More »

## Permutations to arrange N persons around a circular table

Given N, the number of persons. The task is to arrange N person around a circular table. Examples: Input: N = 4 Output: 6 Input:… Read More »

## Check if any permutation of a large number is divisible by 8

Given a large number N and the task is to check if any permutation of a large number is divisible by 8. Examples: Input: N… Read More »

## Maximize a number considering permutations with values smaller than limit

Given two numbers N and M. Construct maximal number by permuting (changing order) the digits of N, not exceeding M. Note : It is allowed… Read More »

## Palindromic Selfie Numbers

Given a number x, find it’s palindromic selfie number according to selfie multiplicative rule. If such a number doesn’t exist, then print “No such number… Read More »

## Amazon interview Experience | Set 413 (SDET-1 On-Campus Internship)

This was a pool campus conducted by amazon for internship. Online Round: There were 20 mcq(+1 for each) and 2 coding questions(+30 for each). MCQ had… Read More »

## Amazon Interview Experience | Set 370 (On Campus for Internship)

Round 1: Online Round(90 minutes) There were 20 MCQs and two coding questions. MCQs were mostly logical reasoning, running time and DS/Algo. There were also… Read More »

## Count number of strings (made of R, G and B) using given combination

We need to make a string of size n. Each character of the string is either ‘R’, ‘B’ or ‘G’. In the final string there… Read More »

## K difference permutation

Given two integers n and k. Consider first permutation of natural n numbers, P = “1 2 3 … n”, print a permutation “Result” such… Read More »

## Qualcomm Interview Experience | Set 7 (Off-Campus)

It was a very good experience to face interview at Qualcomm (Hyderabad-2016) I have attended the interview for a position of Software Engineer and My… Read More »

## Number of permutation with K inversions

Given an array, an inversion is defined as a pair a[i], a[j] such that a[i] > a[j] and i < j. We are given two… Read More »

## Sum of all numbers that can be formed with permutations of n digits

Given n distinct digits (from 0 to 9), find sum of all n digit numbers that can be formed using these digits. It is assumed… Read More »

## Longest common subsequence with permutations allowed

Given two strings in lowercase, find the longest string whose permutations are subsequences of given two strings. The output longest string must be sorted. Examples:… Read More »