Freaks City

House Robber class Solution: def rob(self, values: list[int]) -> int: n = len(values) if n == 0: return 0 if n == 1: return values[0] prev2 = values[0] prev1 = max(values[0], values[1]) for i in range(2, n): current = max(prev2 + values[ ...

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 ...

Problem Description KiKi has a matrix and wants to determine the matrix after performing k row or column swap operations. Please write a program to solve this. Input Description: The first line contains two integers n and m (separated by a space), representing a matrix with n rows and m columns (1 ≤ n ≤ 10, 1 ≤ m ≤ 10). From line 2 to line n+1 ...

Using Map Data Structure for Deduplication A Map object can be employed to track unique values efficiently. The following function iterates through the input array, using a Map to check for duplicates and building a result array with only unique elements. function removeDuplicatesWithMap(inputArray) { const valueMap = new Map(); const u ...

Considre a plank of length n units. Ants are positioned on this plank, and each ant moves at a speed of one unit per second. Some ants move to the left, while others move to the right. When two ants moving in opposite directions meet at a point, they instantaneously reverse their directions and continue moving. This direction change incurs no a ...

LeetCode 977 – Squares of a Sorted Array Algorithm: Two‑pointers After squaring, the largest numbers are at the two ends of the array, while the smallest numbers gather in the middle. This naturally suggests using a pointer at the start and a pointer at the end. Modifying the original array in place can accidentally overrwite elements that hav ...

Given an integer array nums of even length, you need to split it into two arrays, nums1 and nums2, such that: nums1.length == nums2.length == nums.length / 2. nums1 contains distinct elements. nums2 also contains distinct elements. If such a split is posssible, return true; otherwise, return false. Examples Example 1: Input: nums = [1,1,2,2,3 ...

In-Place Element Removal When tasked with filtering out specific values from an array in-place, allocating additional memory is often restricted. The two-pointer method provides an elegant solution by separating the reading and writing processes. Strategy: Read and Write Pointers We initialize two distinct indices: a write_idx to track the posi ...

Several fundamental data structures are frequently used in software development to manage and organize data efficiently. Array An array stores a fixed-size sequential collection of elements of the same type. In C#, common variants include Array, ArrayList, and List<T>. Accessing an element by index is O(1). Searching for a value requires ...

One-Dimensional Binary SearchBinary search efficiently locates a target value within a sorted sequence by repeatedly halving the search interval. The algorithm evaluates the middle element; if it matches the target, the search concludes. If the middle element is less than the target, the search continues in the right subarray. Conversely, if th ...