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向量的数量积（内积，点积） 向量的向量积（外积，叉积） ，符合右手规则。 ，向量积是一个伪向量，定义其方向垂直于进行叉积的两个向量且满足右手规则。 向量点积的物理意义 W = |F|·|S|·cosθ ，表示力F所作的功。 向量叉积的几何意义 计算矢量叉积是与直线和线段相关算法的核心部分... 阅读全文
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TrianglesTime Limit: 2 Seconds Memory Limit: 65536 KBIt is always very nice to have little brothers or sisters. You can tease them, lock them in the bathroom or put red hot chili in their sandwic... 阅读全文
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SudokuTime Limit: 2000MSMemory Limit: 65536KTotal Submissions: 11672Accepted: 5801Special JudgeDescriptionSudoku is a very simple task. A square table with 9 rows and 9 columns is divided to 9 smaller... 阅读全文
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单调队列优化。。。。Max Sum of Max-K-sub-sequenceTime Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 4759 Accepted Submission(s): 1734Problem DescriptionGi... 阅读全文
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第一次写单调队列没有经验。。。。。Sliding WindowTime Limit: 12000MSMemory Limit: 65536KTotal Submissions: 30830Accepted: 9195Case Time Limit: 5000MSDescriptionAn array of size n ≤ 106 is given to you. There is a slidi... 阅读全文
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Persistent NumbersTime Limit: 1000MSMemory Limit: 65536KTotal Submissions: 2825Accepted: 1370DescriptionThe multiplicative persistence of a number is defined by Neil Sloane (Neil J.A. Sloane in The Pe... 阅读全文
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#include #include #include #include using namespace std; #define MAXN 9999#define MAXSIZE 10#define DLEN 4class BigNum{ private: int a[500]; //可以控制大数的位数 int len; //大数长度public: BigNum(){ len =... 阅读全文
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Radar InstallationTime Limit: 1000MSMemory Limit: 10000KTotal Submissions: 41153Accepted: 9125DescriptionAssume the coasting is an infinite straight line. Land is in one side of coasting, sea in the o... 阅读全文
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Game PredictionTime Limit: 1000MSMemory Limit: 10000KTotal Submissions: 8866Accepted: 4225DescriptionSuppose there are M people, including you, playing a special card game. At the beginning, each play... 阅读全文
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Nested DollsTime Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 1805 Accepted Submission(s): 501Problem DescriptionDilworth is the world’s most p... 阅读全文