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Programming Articles
Page 1337 of 2547
Max Sum of Rectangle No Larger Than K in C++
Suppose we have a 2D matrix, and an integer k. We have to find the max sum of a rectangle in the matrix, such that its sum is not greater than k. So, if the input is like −1010-32And k = 3, then the output will be 3, as the sum of marked rectangle is 3.To solve this, we will follow these steps −Define a function maxSumSubmatrix(), this will take one 2D array matrix and k, n := row number, m := column numberans := -inffor initialize l := 0, when l < m, update (increase l by 1), do ...
Read MoreInsert Delete GetRandom O(1) - Duplicates allowed in C++
Suppose, we want to make a data structure, that supports some operations, these operations must be preformed in O(1) amount of time. So let these operations are like −insert(x): insert x into the collectionremove(x): delete x from the collectiongetRandom(): This will find random element form that collection.To solve this, we will follow these steps −Make an array numsmake one map mDefine a function insert(), this will take val, ret := when val is not in minsert size of nums at the end of m[val]insert { val, size of m[val] – 1} pair at the end of numsreturn retDefine a function ...
Read MoreFrog Jump in C++
Suppose there is a frog that is crossing a river. The river is divided into x units and at each unit there may be a stone. The frog can jump on a stone, but not water. Here we have a list of stones' positions in sorted ascending order sequence, we have to check whether the frog is able to cross the river by landing on the last stone, or not. Initially, the frog is on the first stone and assume the first jump must be of 1 unit.When the frog's current jump was k units, then its next jump must ...
Read MoreSplit Array Largest Sum in C++
Suppose we have an array of positive integers and one value m. We can divide this array into m number of contiguous subarrays. We have to devise an algorithm to minimize the largest sum among these m subarrays.So if the array is say [7, 2, 4, 10, 9], and m = 2, then the sum will be 19, as we can make two subarrays like [7, 2, 4] and [10, 9], then the subarray with largest sum is 19.To solve this, we will follow these steps −Define a function splitArray(), this will take an array v, m, n := size ...
Read MoreK-th Smallest in Lexicographical Order in C++
Suppose we have two values n and k. We have to find the lexicographically kth smallest integer in the range of 1 to n. So if the input is like n = 14 and k = 3, then the output will be 11, as the sequence will be [1, 10, 11, 12, 13, 14, 2, 3, 4, 5, 6, 7, 8, 9], then the kth number is 11.To solve this, we will follow these steps −Define a function findKthNumber(), this will take n, k,curr := 1(decrease k by 1)while k is non-zero, do −steps := call the function calcSteps(n, curr, curr + 1)if steps
Read MoreProgram to find Prime Numbers Between given Interval in C++
In this tutorial, we will be discussing a program to find prime numbers between given intervals.For this we would be provided with two integers. Our task is to find the prime numbers in that particular range.Example#include using namespace std; int main() { int a, b, i, j, flag; //getting lower range a = 3; //getting upper range b = 12; cout
Read MoreArithmetic Slices II - Subsequence in C++
Suppose we have an array A, where N numbers are present. A subsequence slice of that array is any sequence of integers like (K0, K1, K2, … Kn) such that 0 = 2. So we have to return the number of arithmetic slices.So if the input is like [2, 4, 6, 8, 10], then the answer will be 7, as there are 7 arithmetic slices. [2, 4, 6], [2, 4, 10], [4, 6, 8], [6, 8, 10], [2, 4, 6, 8], [4, 6, 8, 10], [2, 4, 6, 8, 10], To solve this, we will follow these steps −ret := ...
Read MoreProgram to find remainder when large number is divided by 11 in C++
In this problem, we are given a string num which is a large number. Our task is to create a program to find remainder when large number is divided by 11 in C++.Problem Description − We need to find the remainder when the number defined by the string is divided by 11.Let’s take an example to understand the problemInputnum = “43212981843718452”Output7Solution ApproachTo find the remainder, we obviously need to divide the number. But dividing huge number is a complex process so to ease up the process, we will divide digit by digit. And store the remainder that follows. This process ...
Read MorePoor Pigs in C++
Suppose there are 1000 buckets, one of them is poisonous, others are filled with water. They all look similar. If a pig drinks the poison it will die within 15 minutes. What will be the minimum amount of pigs that we need to find out the poisonous bucket within one hour?So now consider for the general case and devise an algorithm for this. So, the general case is that If there are n different buckets and a pig drinking poison will die within m minutes, how many pigs are needed to find poisonous bucket within p minutes? There is exactly ...
Read MoreProgram to find remainder when large number is divided by r in C++
In this problem, we are given a string num which is a large number and an integer R. Our task is to create a program to find remainder when large number is divided by r in C++.Problem Description − We need to find the remainder when the number defined by the string is divided by r which is a two-digit number.Let’s take an example to understand the problemInputnum = “123423450942121” r = 54Output7Solution ApproachTo find the remainder, we obviously need to divide the number. But dividing huge numbers is a complex process so to ease up the process, we will ...
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