Alice and Bob want to water n plants in their garden. The plants are arranged in a row and are labeled from 0 to n - 1 from left to right where the ith plant is located at x = i.
Each plant needs a specific amount of water. Alice and Bob have a watering can each, initially full. They water the plants in the following way:
- Alice waters the plants in order from left to right, starting from the 0th plant. Bob waters the plants in order from right to left, starting from the (n - 1)th plant. They begin watering the plants simultaneously.
- It takes the same amount of time to water each plant regardless of how much water it needs.
- Alice/Bob must water the plant if they have enough in their can to fully water it. Otherwise, they first refill their can (instantaneously) then water the plant.
- In case both Alice and Bob reach the same plant, the one with more water currently in his/her watering can should water this plant. If they have the same amount of water, then Alice should water this plant.
Given a 0-indexed integer array plants of n integers, where plants[i] is the amount of water the ith plant needs, and two integers capacityA and capacityB representing the capacities of Alice’s and Bob’s watering cans respectively, return the number of times they have to refill to water all the plants.
2077. Paths in Maze That Lead to Same Room
A maze consists of n rooms numbered from 1 to n, and some rooms are connected by corridors. You are given a 2D integer array corridors where corridors[i] = [room1i, room2i] indicates that there is a corridor connecting room1i and room2i, allowing a person in the maze to go from room1i to room2i and vice versa.
The designer of the maze wants to know how confusing the maze is. The confusion score of the maze is the number of different cycles of length 3.
- For example, 1 → 2 → 3 → 1 is a cycle of length 3, but 1 → 2 → 3 → 4 and 1 → 2 → 3 → 2 → 1 are not.
Two cycles are considered to be different if one or more of the rooms visited in the first cycle is not in the second cycle.
Return the confusion score of the maze.
937. Reorder Data in Log Files
You are given an array of logs. Each log is a space-delimited string of words, where the first word is the identifier.
There are two types of logs:
- Letter-logs: All words (except the identifier) consist of lowercase English letters.
- Digit-logs: All words (except the identifier) consist of digits.
Reorder these logs so that:
- The letter-logs come before all digit-logs.
- The letter-logs are sorted lexicographically by their contents. If their contents are the same, then sort them lexicographically by their identifiers.
- The digit-logs maintain their relative ordering.
Return the final order of the logs.
1918. Kth Smallest Subarray Sum
Given an integer array nums of length n and an integer k, return the kth smallest subarray sum.
A subarray is defined as a non-empty contiguous sequence of elements in an array. A subarray sum is the sum of all elements in the subarray.
1503. Last Moment Before All Ants Fall Out of a Plank
We have a wooden plank of the length n units. Some ants are walking on the plank, each ant moves with a speed of 1 unit per second. Some of the ants move to the left, the other move to the right.
When two ants moving in two different directions meet at some point, they change their directions and continue moving again. Assume changing directions does not take any additional time.
When an ant reaches one end of the plank at a time t, it falls out of the plank immediately.
Given an integer n and two integer arrays left and right, the positions of the ants moving to the left and the right, return the moment when the last ant(s) fall out of the plank.