Suppose we have three numbers y, b and r. There are y yellow ornaments, b blue ornaments and r red ornaments for decoration. A decoration will be beautiful, if the number of blue ornaments used is greater by exactly 1 than the number of yellow ornaments, and the number of red ornaments used is greater by exactly 1 than the number of blue ornaments. We want to choose as many ornaments as possible and also want to make our decoration good. We have to find the maximum number of ornaments used for a beautiful decoration.So, if the input is like ... Read More

Suppose we have a string S with n lowercase English letters. We have to reorder the characters in S, so that "trygub" is not a subsequence of the resulting string.So, if the input is like S = "pintontrygubabc", then the output will be "abbcginnoprttuy".StepsTo solve this, we will follow these steps −sort the array S return SExampleLet us see the following implementation to get better understanding −#include using namespace std; string solve(string S){    sort(S.begin(), S.end());    return S; } int main(){    string S = "pintontrygubabc";    cout

In this article, we will explain maximum fruit count to make compote problem and implement a C++ program to solve it. The problem involves finding the maximum number of fruits that can be used to make a compote, given certain constraints. Let's break down the problem statement below. Maximum Fruit Count to Make Compote You are given a list of fruits, say a apples, b bananas, and c cherries, where a, b, and c are the counts of each type of fruit. Your task is to make a compote using these fruits such that the apples, bananas and cherries ... Read More

Suppose we have a 2d array of size n x 4. Consider there are n students and their ids are starting from 0 to n-1. Each of them has four scores on English, Geography, Maths and History. In the table, the students will be sorted by decreasing the sum of their scores. If two or more students have the same sum, these students will be sorted by increasing their ids. We have to find the id of student whose id is 0.So, if the input is like10098100100100100100100909990100100986099then the output will be 2StepsTo solve this, we will follow these steps −n ... Read More

Suppose we have an array A with n elements, and another number H. H is health of an enemy. We have n weapons and damaging power of ith weapon is A[i]. Different weapons can be used to kill the enemy. We cannot use same weapon twice in a row. We have to count minimum how many times we can use weapons to kill the enemy.So, if the input is like A = [2, 1, 7]; H = 11, then the output will be 3, because if we use weapon with damage power 7, then use 2 then again use 7 ... Read More

Suppose we have as string S with even length n. S contains only two types of characters 'a' and 'b'. We want to modify the string so that every its prefix of its length has an equal amount of letters 'a' and 'b'. To achieve that, we can perform the following operation arbitrary number of times: Select some position in his string and replace the letter on this position with the other letter. Return the updated string.So, if the input is like S = "aabbbb", then the output will be "baabab"StepsTo solve this, we will follow these steps −n := ... Read More

Suppose we have an array A with n elements. Here n is even. A[i] is a number written on ith card. There are n/2 people who want to play a game. At the beginning, each player will take two cards. We have to find the way to distribute cards in such a way that sum of values written on the cards will be same for each player.So, if the input is like A = [1, 5, 7, 4, 4, 3], then the output will be [(0, 2), (5, 1), (3, 4)], because A[0] + A[2] = 8, A[5] + A[1] ... Read More

Suppose we have two arrays A and B with n number of elements. Consider an operation: Select two indices i and j, then decrease ith element by 1 and increase jth element by 1. Each element of the array must be non-negative after performing an operation. We want to make A and B same. We have to find the sequence of operations to make A and B same. If not possible, return -1.So, if the input is like A = [1, 2, 3, 4]; B = [3, 1, 2, 4], then the output will be [(1, 0), (2, 0)], because ... Read More

Suppose we have two numbers c and d. Amal has two numbers a and b initially both are zero. Amal wants to perform some operation on them. Before performing each operation, some positive integer k is picked, which is then used to perform one of the following operations −add number k to both a and b, oradd number k to a and subtract k from b, oradd number k to b and subtract k from a.We have to find the minimum number of operations needed to make a and b equal to c and d respectively. If not possible, return ... Read More

Suppose we have a string S with n digits. A number with exactly 11 digits is a telephone number if it starts with '8'. In one operation, we can remove one digit from S. We have to check whether we can make the string a valid phone number or not.So, if the input is like S = "5818005553985", then the output will be True, because we can make the string "8005553985" with 11 characters and first digit is 8.StepsTo solve this, we will follow these steps −m := size of S insert '8' at the end of S if if location of 8