LeetCode 2335. Minimum Amount of Time to Fill Cups

max(ceil(sum(A) / 2), max(A))

LeetCode 2231. Largest Number After Digit Swaps by Parity

This problem can be translated into...

LeetCode 1046. Last Stone Weight

Do as the game. Choose two heaviest stone and do the subtraction.

LeetCode 2099. Find Subsequence of Length K With the Largest Sum

Use priority queue to find the largest k numbers. also and their index.

LeetCode 703. Kth Largest Element in a Stream

Maintain a Heap that contains only the K biggest the element.

LeetCode 506. Relative Ranks

First we need to sort the scores from biggest to smallest.

LeetCode 218. The Skyline Problem

Calculate the building in lines not by the whole building.

开关灯&调整电平

找1~n中的完全平方数

2018 ACM-ICPC Asia Flippy Sequence ZOJ-4060

浙江省赛 Doki Doki Literature Club ZOJ 4035

First sort by value, then sort by lexicography.

浙江省赛 King of Karaoke ZOJ 4025

The point of this problem is to find the most appearance of s[i] - d[i].

浙江省赛 Lucky 7 ZOJ 4036

Check one by one.

浙江省赛 Peak ZOJ 4024

The most important is to consider all the situations that doesn't make a peak.

LeetCode_Single-Number

This is bit XOR Operation.

LeetCode-Container With Most Water

If we combine the left search with the right search, we need to make the lines with shorter height move.