hdu 6216 A Cubic number and A Cubic Number[数学] 题意:判断一个素数是否是两个立方数之差,就是验差分.. 题解:只有相邻两立方数之差才可能,,因为x^3-y^3=(x-y)(x^2+xy+y^2),看(x-y),就能很快想到不相邻的立方数之差是不可能是素数的:),,然后把y=x+1代入,得:p=3x^2+3x+1,所以可得判断条件为:①p-1必须能被3整除:②(p-1)/3必须能表示为两个相邻整数之积. #include<iostream> #inc…
Problem Description A cubic number is the result of using a whole number in a multiplication three times. For example, 3×3×3=27 so 27 is a cubic number. The first few cubic numbers are 1,8,27,64 and 125 . Given an prime number p . Check that if p is…
A Cubic number and A Cubic Number Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 65535/32768 K (Java/Others) Total Submission(s): 4947 Accepted Submission(s): 1346 Problem Description A cubic number is the result of using a whole number i…
题目链接: PKU:http://poj.org/problem?id=3340 HDU:http://acm.hdu.edu.cn/showproblem.php?pid=2410 Description A wild number is a string containing digits and question marks (like 36?1?8). A number X matches a wild number W if they have the same length, and…
Can you find it? Time Limit: 10000/3000 MS (Java/Others) Memory Limit: 32768/10000 K (Java/Others)Total Submission(s): 9180 Accepted Submission(s): 2401 Problem Description Give you three sequences of numbers A, B, C, then we give you a number…
Vases and Flowers 题目链接 http://acm.hdu.edu.cn/showproblem.php?pid=4614 Problem Description Alice is so popular that she can receive many flowers everyday. She has N vases numbered from 0 to N-1. When she receive some flowers, she will try to put them…
Q - Queue HDU - 5493 Problem Description NNN people numbered from 1 to NNN are waiting in a bank for service. They all stand in a queue, but the queue never moves. It is lunch time now, so they decide to go out and have lunch first. When they get bac…
Use map() and Number() to convert to number if possilbe or NaN. var str = ["1","1.23","3","4.0","five", undefined, .00]; var num = str.map( (s) => { return Number(s); }); console.log(num); //[1, 1.23, 3…
一.Ugly Number Write a program to check whether a given number is an ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 6, 8 are ugly while 14 is not ugly since it includes another prime factor 7. Not…
Problem Description Give you three sequences of numbers A, B, C, then we give you a number X. Now you need to calculate if you can find the three numbers Ai, Bj, Ck, which satisfy the formula Ai+Bj+Ck = X. Input There are many cases. Every data cas…
136. Single Number 除了一个数字,其他数字都出现了两遍. 用亦或解决,亦或的特点:1.相同的数结果为0,不同的数结果为1 2.与自己亦或为0,与0亦或为原来的数 class Solution { public: int singleNumber(vector<int>& nums) { if(nums.empty()) ; ; ;i < nums.size();i++) res ^= nums[i]; return res; } }; 137. Single N…
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6278 Time Limit: 6000/3000 MS (Java/Others) Memory Limit: 132768/132768 K (Java/Others) Problem Description The h-index of an author is the largest h where he has at least h papers with citations not les…
Queue Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 862 Accepted Submission(s): 449 Problem Description N people numbered from 1 to N are waiting in a bank for service. They all stand in a…
题目描述: We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked. Every time you guess wrong, I'll tell you whether the number is higher or lower. You call a pre-defined API guess(int n…
Give you three sequences of numbers A, B, C, then we give you a number X. Now you need to calculate if you can find the three numbers Ai, Bj, Ck, which satisfy the formula Ai+Bj+Ck = X. Input There are many cases. Every data case is described as foll…
OO's Sequence Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others) Total Submission(s): 955 Accepted Submission(s): 358 Problem Description OO has got a array A of size n ,defined a function f(l,r) represent the nu…
Constructing Roads In JGShining's Kingdom Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 13646 Accepted Submission(s): 3879 Problem Description JGShining's kingdom consists of 2n(n is no mor…
Give you three sequences of numbers A, B, C, then we give you a number X. Now you need to calculate if you can find the three numbers Ai, Bj, Ck, which satisfy the formula Ai+Bj+Ck = X. Input There are many cases. Every data case is described as foll…
Doubles Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 4266 Accepted Submission(s): 2945 Problem Description As part of an arithmetic competency program, your students will be given randoml…
解题思路:给出两个数列an,bn,求an和bn中相同元素的个数因为注意到n的取值是0到1000000,所以可以用二分查找来做,因为题目中给出的an,bn,已经是单调递增的,所以不用排序了,对于输入的每一个b[i],查找它在an数列中是否存在.存在返回值为1,不存在返回值为0 CD Time Limit: 12000/6000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 627…
报错信息: Caused by: java.sql.SQLException: Io 异常: Invalid number format for port number at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:112) at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:146) …
a number of 和the number of用法 1. A number of + 複數名詞 + 複數動詞 =some/或a lot of + 複數名詞 + 複數動詞 2. The number of + 複數名詞 + 單數動詞 = the amount of =總數 3.例如 The number of cars is increasing. (汽車的…
A cubic number is the result of using a whole number in a multiplication three times. For example, 3×3×3=27 so 27 is a cubic number. The first few cubic numbers are 1,8,27,64 and 125. Given an prime number p. Check that if p is a difference of two cu…
