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Server Side Programming Articles
Page 1318 of 2109
Recover Binary Search Tree in C++
Suppose we have one binary search tree, now consider two elements of this BST is swapped, so we have to recover this binary search tree.So if the given tree is like below (first one), the recovered tree will be (second one) −To solve this, we will follow these steps −Define some prev, first, second reference for nodesDefine one method called findProblem(), this will take nodeif node is null, then returncall findProblem(left of node)if prev is not null and value of prev > value of node, thenif first is null, then first = prevsecond := nodeprev := nodecall findProblem(right of node)From ...
Read MoreProgram to find the Area and Perimeter of a Semicircle in C++
In this problem, we are given a value that denotes the radius of a semicircle. Our task is to create a program to find the Area and Perimeter of a Semicircle in C++.SemiCircle is a closed figure that is half of a circle.Let’s take an example to understand the problem, InputR = 5Outputarea = 39.25 perimeter = 15.7Solution ApproachTo solve the problem, we will use the mathematical formula for the area and perimeter of a semi-circle which is derived by dividing the area of circle by 2.Area of semicircle, A= $½(\prod^*a^2)=1.571^*a^2$Perimeter of semicircle, P =(π*a)Area of semicircle, area = $½(π^*a^2)$Program ...
Read MoreProgram to find the Area and Volume of Icosahedron in C++
In this problem, we are given a value that denotes the side of an icosahedron. Our task is to create a program to find the Area and Volume of Icosahedron in C++.Icosahedron is a regular 30 sided polyhedron. It has 20 equilateral triangles of the same side. There are only 12 vertices of this polyhedron.Dashed lines are for the edges that are behind the visible surface.Let’s take an example to understand the problem, Inputa = 4Program to illustrate the working of our solution, Example#include using namespace std; float calcIcoSArea(float a) { return (8.660 * a * a); } ...
Read MoreMax Points on a Line in C++
Suppose we have a 2D plane. We have to find the maximum number of points that reside on the same straight line. So if the points are like −Then there are 4 pointsTo solve this, we will follow these steps −n := number of points, if n < 3, then return nans := 2for i in range 1 to n – 1count := 0take two points from index i and i – 1, these are p1, p2if p1 and p2 points are same, thenfor j in range 0 to n – 1if points[j].x = p1.x and points[j].y = p1.y, then ...
Read MoreChalkboard XOR Game in C++
Suppose we have an array called nums, where nums[i] are written on a chalkboard. Ram and Sam take turns erasing exactly one element from the chalkboard, with Ram starting first. If erasing a number causes the bitwise XOR of all the elements of the chalkboard to become 0, then that player loses. Bitwise XOR of one element is that element itself, and the bitwise XOR of no elements is 0. If any player starts their turn with the bitwise XOR of all the elements of the chalkboard equal to 0, then that player will win. Suppose the array is holding ...
Read MoreDungeon Game in C++
Suppose there is a story like the demons had captured the princess whose name is P and imprisoned her in the bottom-right corner of a dungeon. The dungeon consists of M row, N column grid-like rooms. Our valiant knight named K was initially positioned in the top-left room and must fight his way through the dungeon to rescue the princess.Now the knight has an initial health point represented by a positive integer. If at any point his health point drops to 0 or below, he dies at that moment.Some of the rooms have demons to guard that room, so the ...
Read MoreProgram to find the Area of a Parallelogram in C++
In this problem, we are given two values that denote the base and height of a parallelogram. Our task is to create a Program to find the Area of a Parallelogram in C++.Parallelogram is a four side closed figure that has opposite sides equal and parallel to each other.Let’s take an example to understand the problem, InputB = 20, H = 15Output300ExplanationArea of parallelogram = B * H = 20 * 15 = 300Solution ApproachTo solve the problem, we will use the geometrical formula for area of parallelogram, Area = base * height.Program to illustrate the working of our solution, ...
Read MoreBest Time to Buy and Sell Stock IV in C++
Suppose we have an array for which the i-th element is the price of a given stock for the day i. We have to devise an algorithm to find the maximum profit. We can complete at most k transactions. So if the input is like [3, 2, 6, 4, 0, 3] and k = 2, then the output will be 7, as buy on day 2 (when price = 2) and sell on day 3 (when price = 6), profit will be 6-2 = 4. Then buy on day 5 (price is 0) and sell on day 6 (price is ...
Read MoreProgram to find the Area of a Pentagon in C++
In this problem, we are given a number n that denotes that side of the pentagon. Our task is to create a program to find the Area of a Pentagon in C++.Pentagon is a five-sided geometric figure.Regular pentagon is a pentagon with all five sides and angles equal.Let’s take an example to understand the problem,Inputa = 7Output84.3Program to illustrate the working of our solution,Example#include using namespace std; float calcpentagonArea(int a){ return ( ((6.8819)*a*a)/4); } int main() { int a = 7; cout
Read MoreSliding Window Maximum in C++
Suppose we have an array called nums, there is a sliding window of size k which is moving from the left of the array to the right. We can only see the k numbers in the window. Each time the sliding window moves to the right side by one position. We have to find the max sliding window. So if the input is like −[1, 3, -1, -3, 5, 3, 6, 8] and k is 3, then the window will be like −Window PositionMax13-1-35368313-1-35368313-1-35368313-1-35368513-1-35368613-1-353688To solve this, we will follow these steps −Define an array ansDefine one double ended queue dqif ...
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