To solve this problem, we can use a bitwise operation. The idea is to use bitwise operators for numbers that appear three times. The main steps are as follows: 1. Initialize a variable result as 0. 2. Iterate through every bit from 0 to 31 (assuming int is 32 bit). Do bitwise AND of

Given an array of size 3X+1, where every element occurs three times, except one element, which occurs only once. Find the element that occurs only once.Input FormatThe first line of input contains T - the number of test cases. It's followed by 2T lines, the first line contains N - the size of the array (of the form 3X + 1) and second line contains the elements of the array.Output FormatFor each test case, print the number which occurs only once, separated by new line.Constraints30 points1 <= T <= 1001 <= N <= 10370 points1 <= T <= 1001 <= N <= 106ExampleInput2105 7 8 7 7 9 5 9 5 9710 20 20 30 20 30 30Output810

Question

Given an array of size 3X+1, where every element occurs three times, except one element, which occurs only once. Find the element that occurs only once.Input FormatThe first line of input contains T - the number of test cases. It's followed by 2T lines, the first line contains N - the size of the array (of the form 3X + 1) and second line contains the elements of the array.Output FormatFor each test case, print the number which occurs only once, separated by new line.Constraints30 points1 <= T <= 1001 <= N <= 10370 points1 <= T <= 1001 <= N <= 106ExampleInput2105 7 8 7 7 9 5 9 5 9710 20 20 30 20 30 30Output810

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Solution

To solve this problem, we can use a bitwise operation. The idea is to use bitwise operators for numbers that appear three times. The main steps are as follows:

Initialize a variable result as 0.
Iterate through every bit from 0 to 31 (assuming int is 32 bit). Do bitwise AND of

Similar Questions

You are given an array of N elements. All elements of the array are in range 1 to N-2. All elements occur once except two numbers, which occur twice. Your task is to find the two repeating numbers.Input FormatThe first line of input contains T - the number of test cases. It's followed by 2T lines, the first line contains N - the size of the array and second line contains the elements of the array.Output FormatPrint the 2 repeated numbers in sorted manner, for each test case, separated by new line.Constraints30 points1 <= T <= 1004 <= N <= 10370 points1 <= T <= 1004 <= N <= 106ExampleInput281 3 2 3 4 6 5 5101 5 2 8 1 4 7 4 3 6Output3 51 4

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Given an array of unique integer elements, print all the subsets of the given array in lexicographical order.Input FormatThe first line of input contains T - the number of test cases. It's followed by 2T lines, the first line contains N - the size of the array and the second line contains the elements of the array.Output FormatFor each test case, print the subsets of the given array in lexicographical order, separated by new line. Print an extra newline between output of different test cases.Constraints1 <= T <= 1001 <= N <= 100 <= A[i] <= 100ExampleInput335 15 3 257 96 43 15 8 23 Output3 3 5 3 5 15 3 15 5 5 15 15 57 57 96 96 3 3 8 3 8 15 3 8 15 23 3 8 23 3 15 3 15 23 3 23 8 8 15 8 15 23 8 23 15 15 23 23

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