Programming Competition Problem Solutions and Analysis
Mathematical Caclulation Problem
Given the formula for distance between a point and a line, we can simpliyf the calculation to |x-y| * 50:
#include <iostream>
#include <cmath>
int main() {
int x, y;
std::cin >> x >> y;
std::cout << abs(y - x) * 50 << '\n';
return 0;
}
String Output Problem
S ...
Posted on Fri, 19 Jun 2026 18:14:18 +0000 by jantheman
Prime Factorization in Java
Prime factorization involves expressing a composite number as a product of prime numbers. A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself.
Factorizaiton Algorithm
The algorithm proceeds as follows:
Initialize with the smallest prime number (2)
Divide the target number repeatedly by the cu ...
Posted on Sun, 14 Jun 2026 16:23:38 +0000 by ttaceman
Efficient Algorithms for GCD Pair Counting, Incremental Construction, and Circular Coloring
Counting GCD Pairs in Dynamic Multisets
Maintain a multiset of positive integers with insertion and deletion operations. For each query, count unordered pairs (i, j) where i ≠ j and gcd(i, j) = k.
Constraints: n, V ≤ 10^5.
Conisder the change in answer count:
$$\sum_{i=1}^{V}c_i[\gcd(i,x)=k]$$
Let x' = x/k:
$$\sum_{i=1}^{\lfloor V/k \rfloor}c_{ ...
Posted on Sat, 06 Jun 2026 17:32:00 +0000 by dhruvasagar
AtCoder Beginner Contest 002 Solutions
Problem A: Maximum Value
Given two positive integers as input, output the larger value.
Solution
Simply compare the two values and output the maximum.
#include <bits/stdc++.h>
using namespace std;
int main() {
int a, b;
cin >> a >> b;
cout << max(a, b) << endl;
return 0;
}
Problem B: Remove Vowel ...
Posted on Wed, 20 May 2026 21:00:00 +0000 by HostingTrade
Advanced Formatting Techniques in Markdown
Overview
After covering mathematical expressions in Markdown, further precise formatting—similar to what is achievable in word processors or academic writing—requires additional techniques.
Font Customization
Font Families
Different font styles can be applied using specific commands:
Roman style: \textrm{text}
Sans serif: \textsf{text}
Typewri ...
Posted on Wed, 20 May 2026 20:15:30 +0000 by GreenUser
Quaternion-Based Rotation Representation in Game Engines
Alternative Rotation Representations
3×3 Rotation Matrix
Memory overhead: A matrix requires 9 floats, or 16 floats if using an affine transformation
Computational complexity: Rotating a vector through matrix multiplication involves 3 dot products, totaling 9 multiplications and 6 additions
Poor readability: A matrix is essentially a grid of nu ...
Posted on Wed, 20 May 2026 16:15:33 +0000 by webstyler
Computing Total Weight Contributions and Sequence Constraints via Combinatorics and Matrix Exponentiation
Problem D: Weighted Permutation Sum
Given a sequence of numbers, consider generating all its non-empty subsequences, constructing a permutation by repeatedly removing the last element until one remains, and summing the final remaining numbers across all such processes. The problem requires computing the total sum over all subsequences.
For anal ...
Posted on Mon, 18 May 2026 21:36:44 +0000 by fredmeyer
Algorithmic Approaches and Implementations for The 49th ICPC Asia Regionals Online Contest II
F-Tourist
Iterate through the input array while tracking the cumulative score. Once the threshold of 4000 is reached, output the current one-based index and terminate early.
#include <iostream>
#include <vector>
using namespace std;
void solve() {
int n;
cin >> n;
vector<int> scores(n);
int target_thres ...
Posted on Thu, 14 May 2026 18:57:27 +0000 by jakobdoppler
Solving JavaScript Precision Issues with Rust WebAssembly for Large Number Calculations
Using Rust and WebAssembly to Handle High-Precision Arithmetic
When dealing with large numbers in JavaScript, floating-point precision limitations often lead to unexpected results. To overcome these constraints, developers can leverage Rust compiled to WebAssembly (WASM) for accurate calculations.
Setting Up the Project
Begin by initializing a ...
Posted on Wed, 13 May 2026 11:18:10 +0000 by thomas777neo
Essential LaTeX Formatting and Document Structure Guidelines
Document Layout and Configuration
Section breaks are initiated by blank lines in the source file. To manage column layouts, utilize the multicol package or set the document class option to twocolumn. For specific page margins, the anysize package allows customizing top, bottom, left, and right spacing.
Mathematical Expression Syntax
Inline math ...
Posted on Fri, 08 May 2026 23:54:20 +0000 by rpmorrow