number(4,2)  ##.## 例如:45.23 number(6,2)就是####.##   例如:9994.11   4代表总共有效位数为4位2代表小数位为2位…

题意:给你N位数,接下来有N行,第i行先输入n,表示这个数的第i 位上可以在接下来的n个数中挑选,然后i 行再输n个数. 然后输入需要匹配的母串,让你输出母串中有多少个可行的N位子串. n<=1e3,len<=5e6 思路:From https://blog.csdn.net/no2015214099/article/details/72902820 这题 bitset 的使用相当于是作为一个指针来使用的. 首先用bitset定义出现的数会在哪几位上出现,置为1. 定义ans的初始位为1,每一…

UIColor深入研究(CGColor,CIColor) 由于跟人比较喜欢研究关于图层与动画方面的技术,正打算看看别人写的好东西,就遇到了好几个问题, 第一:UIClor类方法的使用 就是关于UIColor的使用,记得之前开发中我们使用的都是UIColor后面直接食用类方法获取颜色活着使用 + (UIColor *)colorWithRed:(CGFloat)red green:(CGFloat)green blue:(CGFloat)blue alpha:(CGFloat)alpha;但是突然…

  He's Circles He wrote n letters "X" and "E" in a circle. He thought that there were 2n possibilities to do it, because each letter may be either "X" or "E". But Qc noticed that some different sequences of letters…

Problem Description Today is the 1st anniversary of BestCoder. Soda, the contest manager, gets a string s of length n. He wants to find three nonoverlapping substrings s[l1..r1], s[l2..r2], s[l3..r3] that: . ≤l1≤r1<l2≤r2<l3≤r3≤n . The concatenation…

InnoDB行格式分两种格式(COMPACT,redundant)默觉得COMPACT compact的存储格式为 首部为一个非NULL的变长字段长度列表,并且是依照列的顺序逆序放置的,当列的长度小于255字节,用1字节表示,若大于255个字节.用2个字节表 示,varchar的最大长度为65535>,由于两个字节为16位,即65535,第二部分是NULL标志位,该位指示了该行是否有NULL值, 实用01表示,无则用00表示.接下去的部分是为记录头信息(record header)固定占用5个字…

[BZOJ3872]Ant colony(二分,动态规划) 题面 又是权限题... Description There is an entrance to the ant hill in every chamber with only one corridor leading into (or out of) it. At each entry, there are g groups of m1,m2,...,mg ants respectively. These groups will ent…

POJ 2502 Subway / NBUT 1440 Subway / SCU 2186 Subway(图论,最短距离) Description You have just moved from a quiet Waterloo neighbourhood to a big, noisy city. Instead of getting to ride your bike to school every day, you now get to walk and take the subway.…

POJ 1511 Invitation Cards / UVA 721 Invitation Cards / SPOJ Invitation / UVAlive Invitation Cards / SCU 1132 Invitation Cards / ZOJ 2008 Invitation Cards / HDU 1535 (图论,最短路径) Description In the age of television, not many people attend theater perfor…

POJ 2240 Arbitrage / ZOJ 1092 Arbitrage / HDU 1217 Arbitrage / SPOJ Arbitrage(图论,环) Description Arbitrage is the use of discrepancies in currency exchange rates to transform one unit of a currency into more than one unit of the same currency. For exa…