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Leetcode: Shortest Way to Form String
Greedy Use two pointers, one for source: i, one for target: j. While j scan through target, try to match each char of j in source by moving i. Count h ...
分类:其他好文   时间:2019-10-03 16:27:31    阅读次数:107
Codeforces Round #589 (Div. 2) A. Distinct Digits
链接: https://codeforces.com/contest/1228/problem/A 题意: You have two integers l and r. Find an integer x which satisfies the conditions below: l≤x≤r. Al ...
分类:其他好文   时间:2019-10-03 14:19:24    阅读次数:124
What is a partition key?
DynamoDB supports two types of primary keys: Partition key: A simple primary key, composed of one attribute known as the partition key. Attributes in ...
分类:其他好文   时间:2019-10-03 12:48:05    阅读次数:90
Codeforces Round #590 (Div. 3) C. Pipes
链接: https://codeforces.com/contest/1234/problem/C 题意: You are given a system of pipes. It consists of two rows, each row consists of n pipes. The top ...
分类:其他好文   时间:2019-10-03 01:01:48    阅读次数:118
【Leetcode】2. Add Two Numbers 两数相加
You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contai ...
分类:其他好文   时间:2019-10-02 19:08:34    阅读次数:109
Price Transform 价格转换(TA-lib)
TA-Lib模块中提供的价格转换函数有四个,主要用于计算开盘价、收盘价、最高价、最低价之间的均值,具体如下表所示。 AVGPRICE:average Price, 平均价格函数:ta.AVGPRICE(open,high,low,close) MEDPRICE:Median Price, 中位数价格 ...
分类:其他好文   时间:2019-10-02 18:54:50    阅读次数:86
Two progressions(CodeForces-125D)[鸽巢原理]
题意:将一列数划分为两个等差数列。 思路:首先,我要吹爆鸽巢原理!!!真的很强大的东西!!! 加入能完成题设操作,则前三个数中,必有至少两个数在同一序列,枚举三种情况(a1 a2,a2 a3,a1 a3分别为等差数列的前两项)。 注:枚举情况时,如果操作失败,则将已成功生成的等差数列末项划分到另一个 ...
分类:其他好文   时间:2019-10-02 17:03:26    阅读次数:86
Two progressions CodeForce 125D 思维题
An arithmetic progression is such a non-empty sequence of numbers where the difference between any two successive numbers is constant. This constant n ...
分类:其他好文   时间:2019-10-02 10:33:46    阅读次数:96
PAT Advanced 1154 Vertex Coloring (25 分)
A proper vertex coloring is a labeling of the graph's vertices with colors such that no two vertices sharing the same edge have the same color. A colo ...
分类:其他好文   时间:2019-10-02 10:33:30    阅读次数:98
【leetcode】1208. Get Equal Substrings Within Budget
题目如下: You are given two strings s and t of the same length. You want to change s to t. Changing the i-th character of s to i-th character of t costs | ...
分类:其他好文   时间:2019-10-02 10:27:08    阅读次数:65
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