How to find all subsequences with sum equal to K?

How to find all subsequences with sum equal to K?

Given an array arr [] of length N and a number K, the task is to find all the subsequences of the array whose sum of elements is K Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Is there a maximum even sum for K?

Given an array arr [] consisting of N positive integers, and an integer K, the task is to find the maximum possible even sum of any subsequence of size K. If it is not possible to find any even sum subsequence of size K, then print -1. Explanation: Subsequence having maximum even sum of size K ( = 3 ) is {4, 6, 8}.

How to find longest sub-array with sum k?

Naive Approach: Consider the sum of all the sub-arrays and return the length of the longest sub-array having sum ‘k’. Time Complexity is of O (n^2). Initialize sum = 0 and maxLen = 0. Create a hash table having (sum, index) tuples. Accumulate arr [i] to sum. If sum == k, update maxLen = i+1. Check whether sum is present in the hash table or not.

Can you select any other element in the subsequence?

If we select element at index i such that i + k + 1 >= N, then we cannot select any other element as part of the subsequence. Hence we need to decide whether to select this element or one of the elements after it.

Given an array arr [] of length N and a number K, the task is to find all the subsequences of the array whose sum of elements is K Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Given an array arr [] consisting of N positive integers, and an integer K, the task is to find the maximum possible even sum of any subsequence of size K. If it is not possible to find any even sum subsequence of size K, then print -1. Explanation: Subsequence having maximum even sum of size K ( = 3 ) is {4, 6, 8}.

How to find sum divisible by K-leetcode?

Input: A = [4,5,0,-2,-3,1], K = 5 Output: 7 Explanation: There are 7 subarrays with a sum divisible by K = 5: [4, 5, 0, -2, -3, 1], [5], [5, 0], [5, 0, -2, -3], [0], [0, -2, -3], [-2, -3]

Which is an example of subarray sum equals K?

Subarray Sum Equals K. Medium. Add to List. Given an array of integers nums and an integer k, return the total number of continuous subarrays whose sum equals to k. Example 1: Input: nums = [1,1,1], k = 2 Output: 2. Example 2:

What’s the smallest number k that can be formed?

If no such number k can be formed then print “-1”. Input : 100 Output : 455 4*5*5 = 100 and 455 is the smallest possible number. Input : 26 Output : -1 Recommended: Please try your approach on {IDE} first, before moving on to the solution.

How to find the maximum and minimum of K numbers?

We are allowed to take any k integers from the given array. The task is to find the minimum possible value of the difference between maximum and minimum of K numbers. Input : arr [] = {10, 100, 300, 200, 1000, 20, 30} k = 3 Output : 20 20 is the minimum possible difference between any maximum and minimum of any k numbers.

How to find the next number in a sequence?

We already know term 5 is 21 and term 4 is 13, so: One of the troubles with finding “the next number” in a sequence is that mathematics is so powerful we can find more than one Rule that works. What is the next number in the sequence 1, 2, 4, 7,?

Find the next number in the sequence using difference table. Please enter integer sequence (separated by spaces or commas). Sequence solver (by AlteredQualia) Find the next number in the sequence (using difference table). Please enter integer sequence (separated by spaces or commas): Example ok sequences: 1, 2, 3, 4, 5 1, 4, 9, 16, 25

How to find the sum of the arithmetic sequence?

Using the same number sequence in the previous example, find the sum of the arithmetic sequence through the 5 th term: A geometric sequence is a number sequence in which each successive number after the first number is the multiplication of the previous number with a fixed, non-zero number (common ratio).

How to count number of substrings with exactly k distinct characters?

A simple way is to generate all the substring and check each one whether it has exactly k unique characters or not. If we apply this brute force, it would take O (n*n) to generate all substrings and O (n) to do a check on each one. Thus overall it would go O (n*n*n).