题目描述：
You have a total of n coins that you want to form in a staircase shape, where every k-th row must have exactly k coins.
Given n, find the total number of full staircase ...
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[LeetCode]Arranging Coins
[LeetCode]Find Right Interval
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LeetCode.
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LeetCode 436. Find Right Interval
Given a set of intervals, for each of the interval i, check if there exists an interval j whose start point is bigger than or equal to the end point of the interval i ...
[LeetCode]Non-overlapping Intervals
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LeetCode.
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LeetCode 435. Non-overlapping Intervals
Given a collection of intervals, find the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping.
Note:
- You may assume the interval's end point is always bigger than ...
[LeetCode]Add Two Numbers II
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LeetCode.
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LeetCode 445. Add Two Numbers II
You are given two linked lists representing two non-negative numbers. The most significant digit comes first and each of their nodes contain a single digit. Add the two numbers and return it as ...
[LeetCode]Find All Duplicates in an Array
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LeetCode.
题目描述：
LeetCode 442. Find All Duplicates in an Array
Given an array of integers, 1 <= a[i] <= n (n = size of array), some elements appear twice and others appear once. Find all the elements that appear twice in ...