Level: Medium 题目描述: Given an array nums of n integers, are there elements a, b, c in nums such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero. Note: The solution set must not contain duplicate triplets. Exampl
Oracle查询库中记录数大于2千万的所有表 假如当前用户拥有select any table权限,则可以使用下列sql语句: select table_name, num_rows from dba_tables t where t.owner = upper('hr') and num_rows > 20000000; 或 select table_name, num_rows from all_tables t where t.owner = upper('hr') and num_row
C. Book Reading time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Polycarp is reading a book consisting of nn pages numbered from 11 to nn. Every time he finishes the page with the number div
将字符串中的每个数都抽取出来,然后统计所有数的个数并求和. 输入格式: 一行字符串,字符串中的数之间用1个空格或者多个空格分隔. 输出格式: 第1行:输出数的个数.第2行:求和的结果,保留3位小数. 输入样例: 2.1234 2.1 3 4 5 6 输出样例: 6 22.223 代码: a = input() list = a.split(" ") total = 0 count = 0 for i in range(0, len(list)): if list[i] == '': c
唯一数的生成很简单,基本上以时间为基础进行生成.在JDK里面已经有java.util.UUID类可以生成唯一的随机数.如果希望生成的唯一数为特定的格式,那么就需要自己来生成唯一数了.生成唯一数时有两个因素是必须在考虑的: 必须保证唯一,这个一般以时间为基础进行变化. 高效,当然越高效越好. 有时我们希望在生成的唯一数中包含特定的内容,如把当前时间,如20110609132641,作为前缀等.以下片段供参考: import java.util.Date; public class Generate
function [sys,x0,str,ts,simStateCompliance] = sfuntmpl(t,x,u,flag) %SFUNTMPL General MATLAB S-Function Template % With MATLAB S-functions, you can define you own ordinary differential % equations (ODEs), discrete system equations, and/or just about %