Freaks City

Problem Overview In a competitive selection process, $n$ judges vote for $m$ available brands using a multi-round elimination system. The goal is to determine if a single brand can emerge as the winner or if the selection fails due to a tie in the final round. Elimination Rules The process follows these logic steps until a result is determined: ...

Difficulty range [1, 10], where ≤ 5 is easy, 6 requires thinking for ≤ 30min, 7 is barely solvable (1h). 8 means it's unsolvable but seems not difficult. 9 is currently unsolvable but can be naturally derived from the solution. 10 is extremely difficult to understand even the solution. Thinking time should be around [40, 80] min, not ≤ 30 min. ...

A - Shrinking Given a string s, determine the minimum number of operasions required to make all characters identical. Each operation reduces the string length by one by selecting characters from adjacent positions. #include <bits/stdc++.h> using namespace std; int main() { string input; cin >> input; int length = input. ...

Contest preparation requires a structured approach to covering fundamental algorithms and optimizing problem-solving strategies. The following outlines core technical topics and execution practices essential for competitive programming. Core Algorithms and Data Structures Simulation and Mathematics High-precision arithmetic is critical for p ...

Sorting, searching, dynamic programing, and graph algorithms form the backbone of competitive programming. This article presents a curated list of such patterns, each accompanied by a concise Java implementation. The examples draw inspiration from the ACwing problem set, covering topics from basic sorting to advanced combinatorial mathematics. ...

A: Basic Arithmetic and Output Given integers a, b, c, d, compute (a + b) * (c - d) and output the result followed by the string "Takahashi". int a = input(), b = input(), c = input(), d = input(); cout << (a + b) * (c - d) << endl; cout << "Takahashi" << endl; Time complexity: O(1) B: Finding Corne ...

Problem A: Trapezoid Area Given the upper base $a$, lower base $b$, and height $h$ of a trapezoid, the area is calculated using the formula: $$\text{Area} = \frac{(a + b) \times h}{2}$$ Problem B: Card Game for Three Three players, A, B, and C, each start with a string of cards. Starting with player A, they draw cards in a sequence. If a player ...

Header File Templates C++ Template #include <bits/stdc++.h> #define fi first #define endl '\n' #define se second #define lowbit(x) ((x)&(-(x))) #define all(x) begin(x), end(x) #define lp(i, j, k) for(int i = int(j); i <= int(k); i++) #define rlp(i, j, k) for(int i = int(j); i >= int(k); i++) #define IO std::ios::sync_with_std ...

Prefix Matching and Keyboard Layout Reconstruction This problem involves identifying possible next characters based on a given prefix and mapping them to a specific $4 \times 8$ grid layout. The core task is to filter a list of strings that start with a specific sequence and mark the character that immediately follows that sequence. #include &l ...

Factorization into Factorial Divisors Given integers (n) and (m) where (1 \le m \le n!) and (n \le 20), decompose (m) into a sum of at most (n) divisors of (n!). A solution is guaranteed to exist. Define a sequence (d_i = \frac{n!}{i!}) for (i) from 1 to (n). By iterating downwards from (i=n) to (1) and greedily subtracting the largest possible ...