Freaks City

Problem 1: Equalizing Elements via Modulo Problem Statement Given an array of integers, determine if it is possible to make all elements equal by repeatedly applying a modulo operation with an integer $x \ge 2$. In each step, every element $a_i$ is replaced by $a_i \bmod x$. Analysis The core constraint lies in the behavior of small numbers und ...

Score: 260 points | Rank: 3rd T1: 100 points T2: 100 points T3: 60 points T4: 0 points Problem Solutiosn T1 - Sequence Generaiton Standard simulation problem. For each sequence iteration, count consecutive digits from the previous sequence. #include <bits/stdc++.h> using namespace std; string sequence[30]; int main() { int n; ...

To maximizee the number of positive votes, we can separate reviews into two groups: one for negative ratings (value 2) and another for all others. Since negative reviews contribute nothing to the total, we simply count all non-negatvie ratings. #include <bits/stdc++.h> using namespace std; int main() { ios::sync_with_stdio(false); ...

flandre The optimal selected sequence must be a contiguous suffix in the sorted array of fireworks by their "real effect" values. This is because any gap in the selection can be filled to increase the total "perceived effect". After sorting the fireworks by real effect, we compute for each position i the contribution b[i] as ...

Made Up Problem Statement Given three sequences A, B, C, count the number of pairs (i, j) such that A[i] = B[C[j]]. Solution Approach Since all values are bounded between 1 and N, we can use frequency counting. For each value v, count how many times it appears in array A (stored in cntA) and how many times it appears as B[C[j]] (stored in cntB) ...

Problem Statement Given a sequence of length n: S1, S2, S3, ..., Sn, process T queries. Each query provides four integers l, r, a, b. For all indices i ∈ [l, r], answer two questions: Count of positions where Si ∈ [a, b] Number of distinct values among Si that satisfy Si ∈ [a, b] Constraints: n ≤ 10^5, T ≤ 10^6 Analysis of Failed Approaches A ...

We evaluated the performance of various C++ input methods by processing 1,000,000 randomly generated integers (within INT32 range) on an Intel Core i5-12400 system running Windows 11. Tested Input Methods Standard scanf Standard cin Custom fast read Bitwise optimized fast read fread + bitwise optimized read cin with sync disabled cin with sync ...

The problem models a sequential arrangement where each position $i$ offers two distinct categories of elements. Category X occupies exactly one slot, while Category Y spans two consecutive slots $(i-1, i)$. The objective is to compute the total number of valid configurations modulo $10^9+7$. A two-state dynamic programming approach efficiently ...

Tree-Based Resource Distribution When distributing a fixed quantity of resources across a tree structure where each node must eventually hold an equal amount, removing any edge partitions the graph into two independent substructures. Let the total resource sum be $S$ and the number of nodes be $N$. The target allocation per node is $k = S / N$. ...

A. Apple Tree Ring Given a sequence of integers representing apple counts on trees arranged in a circle, determine the maximum number of distinct values that can be consumed under infinite rotations. Since rotations allow arbitrary reordering over time, the optimal strategy is to consume one unique value per round. Hence, the answer equals the ...