Freaks City

Circular Array Merging with Max-Cost We are given a circular array of positive integers. In one step we can pick any two adjacent elements, remove them, and pay a cost equal to the larger of the two values. The goal is to reduce the array to a single element while minimiizng the total cost. Key observation Because every merge can only increase- ...

Greedy Validation of Monotonic SequencesDetermining whether an array can be transformed into a non-decreasing sequence under specific modification rules requires a greedy traversal approach. The core condition involves checking adjacent elements and applying a limited increment operation when a descending pair is encountered.Algorithmic Strateg ...

Preface This virtual contest didn't go as smoothly as expected. I spent longer than anticipated on problem B. For problem D, I identified the solution approach quickly but failed to account for several edge cases, resulting in three wrong submissions. Moving forward, I need to pay closer attention to edge cases during competition and work throu ...

Remove Minimum Intervals to Eliminate Overlaps Given a list of intervals, determine the minimum number of intervals to remove so that the remaining ones do not overlap. Adjacent intervals like [1,2] and [2,3] are not considered overlapping. A greedy approach works by sorting intervals by their end points. After sorting, iterate through the list ...

Problems Data Partitioning Given an integer array nums of even length, split it into two arrays nums1 and nums2, such that: nums1.length == nums2.length == nums.length / 2 Both nums1 and nums2 contain unique elements. Return true if the array can be partitioned in this way, otherwise return false. Approach Use a hash map to count occurrences ...

Given a positive integer $ n $, determine whether it can be expressed as a non-negative integer combination of 2020 and 2021 — that is, whether there exist integers $ a \geq 0 $ and $ b \geq 0 $ such that: $$ n = 2020a + 2021b $$ Rewriting the equation reveals a useful structure: $$ n = 2020(a + b) + b = 2020k + b, $$ where $ k = a + b $. Since ...

Given a rectangular cake of height h and width w, and two integer arrays horizontalCuts and verticalCuts where horizontalCuts[i] is the distance from the top of the cake to the i-th horizontal cut and verticalCuts[j] is the distance from the left side of the cake to the j-th veritcal cut, return the maximum area of a peice of cake after you cut ...

This problem requires counting the number of zeros between the first and last occurrence of 1 in an array. #include <bits/stdc++.h> using namespace std; typedef long long ll; void solve() { int n; cin >> n; vector<int> arr(n); int firstOne = -1, lastOne = -1; for (int i = 0; i < n; i++) { ...

Contest Overview This round was relatively straightforward, so this editorial will focus on both the technical problem solutions and the interesting sequence of events during the contest. Problem A - Subset Mex Problem Statement: Given a set a with |a| = n, partition it into two sets A and B to maximize mex(A) + mex(B). Multiple test cases. Con ...

Contest Overview Total Score: 290 Ranking: 3 Problems Solved: 2 Problem Solutions Problem 1: Interview Screening Score: 100 **Analysis:**This is a relatively straightforward problem that resembles bucket sorting. The key is to properly handle the conditional checks without mixing them up. Implementation: // Store possible outcomes string result ...