今天想定义一个类常量,结果如下面那样定义,确报错了.error is: Integer number too large public static final Long STARTTIME = 1493568000000; 我就去查了下,在后面加上L,就好了,就会作为long类型来处理了,若是不加,则作为int处理,而int是没有这么大的值的.正确的则是 public static final Long STARTTIME = 1493568000000L;1注意: System.curren…

Accept: 189    Submit: 461Time Limit: 1000 mSec    Memory Limit : 32768 KB  Problem Description One integer number x is called "Mountain Number" if: (1) x>0 and x is an integer; (2) Assume x=a[0]a[1]...a[len-2]a[len-1](0≤a[i]≤9, a[0] is posit…

把数位dp写成记忆化搜索的形式,方法很赞,代码量少了很多. 下面为转载内容:  a positive integer number is beautiful if and only if it is divisible by each of its nonzero digits.    问一个区间内[l,r]有多少个Beautiful数字    范围9*10^18        数位统计问题,构造状态也挺难的,我想不出,我的思维局限在用递推去初始化状态,而这里的状态定义也比较难    跟pre的…

1.int类型和String类型的相互转换 A.int -- String 推荐用: public static String valueOf(int i) 返回 int 参数的字符串表示形式. B.String -- int 推荐用: public static int parseInt(String s) 将字符串参数作为有符号的十进制整数进行解析 public class IntegerDemo { public static void main(String[] args) { // i…

B. Smallest number Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/55/problem/B Description Recently, Vladimir got bad mark in algebra again. To avoid such unpleasant events in future he decided to train his arithmetic skil…

Codeforces 55D Beautiful Number a positive integer number is beautiful if and only if it is divisible by each of its nonzero digits. Input The first line of the input contains the number of cases t (1 ≤ t ≤ 10). Each of the next t lines contains two…

 Problem Description One integer number x is called "Mountain Number" if: (1) x>0 and x is an integer; (2) Assume x=a[0]a[1]...a[len-2]a[len-1](0≤a[i]≤9, a[0] is positive). Any a[2i+1] is larger or equal to a[2i] and a[2i+2](if exists). For e…

Description In this problem, you are given a pair of integers A and B. You can transform any integer number A to B by adding x to A.This x is an integer number which is a prime below A.Now,your task is to find the minimum number of transformation req…

通过Hibernate映射实体时会根据数据库中NUMBER类型的精度,生成相应的POJO类中相对应的主键类型.经过亲测结果如下: NUMBER(1) POJO类中生成的是Boolean publicclass Test implements java.io.Serializable { // Fields private Boolean id; } NUMBER(2) POJO类中生成的是Byte publicclass Test implements java.io.Serializable…

描述 Given a string, convert it to an integer. * You may assume the string is a valid integer number that can be presented by a * signed 32bit integer (-231 ~ 231-1). 样例 给出 "123", 返回 123. public class Solution { /** * @param str: A string * @retur…