C++ Algorithms for Binary Search and Prefix Sums
C++ Competitive Programming Solutions
This document contains several C++ solutions for common algorithmic problems involving prefix sums, binary search, and matrix manipulation.
1. Prefix Sum and Lower Bound Algorithm
#include <bits/stdc++.h>
using namespace std;
int main() {
int n;
long long k;
cin >> n >> k;
vector<long long> pref(n + 1, 0);
for (int i = 1; i <= n; i++) {
long long x;
cin >> x;
pref[i] = pref[i - 1] C++ Algorithms and Binary Search Implementation Codes
C++ Binary Search and Algorithms Collection
1. Binary Search Implementation
#include <iostream>
using namespace std;
int main(){
int n;
cin >> n;
int a[100000];
for (int i = 0; i < n; i++)
cin >> a[i];
int x;
cin >> x;
int l = 0, r = n - 1;
while (l <= r) {
int m = (l + r) / 2;
if (a[m] == x) {
cout << "Yes";
return 0;
}
if (a[m] < x)
l = m + 1;
Altair Cheat Sheet Python: Data Visualization Reference
Altair Cheat Sheet Python
01 Build a chart
1. Import + general pattern
import altair as alt
chart = (
alt.Chart(data).mark_…()
.encode(x=…, y=…, color=…)
.transform_…(…).properties(…)
.interactive()
)
2. Choose a chart type
mark_bar bars / aggregated comparison
mark_line trends over an ordered axis
mark_circle scatter plots
mark_area filled trends / totals
mark_rect heat maps
mark_arc pie or donut charts
mark_boxplot distribution summaries
mark_geoshape
Essential Web Development and Java Networking Concepts
CSS Box Model Explained
Every HTML element is treated as a rectangular box made up of four layers, from inside out:
┌─────────────────────────────┐
│ MARGIN │
│ ┌─────────────────────────┐ │
│ │ BORDER │ │
│ │ ┌─────────────────────┐ │ │
│ │ │ PADDING │ Java Object-Oriented Programming Concepts and Solutions
Core Concepts of Object-Oriented Programming
False. An abstract class cannot be instantiated directly. You cannot create an object of an abstract class using new. You must create an object of a concrete subclass.
False. Java does not allow a class to extend more than one class. However, a class can implement multiple interfaces.
False. Method overloading means having the same method name but different parameter lists. A different return type alone is not enough.
True. The reference type determines which
Read MoreIt used to define the member functions of a class outside
15 Demonstrate nesting of member function.
Class
Student
{ int marks;
void showMarks()
{ cout
<< "Marks = " << marks << endl;
}
public:
Void getMarks()
{ marks = 85;
ShowMarks(); // Calling another member function
}
};
Int main()
{ Student s;
S.GetMarks();
Return 0;
}
4 Write a short note on defining member functions.1. Defining the function inside the class
class Student
{ int age;
public:
void display()
{ cout << “Age = ” << age;