Arcane Numbers 1 Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4320 Description Vance and Shackler like playing games. One day, they are playing a game called "arcane numbers". The ga…

A - Arcane Numbers 1 Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4320 Description Vance and Shackler like playing games. One day, they are playing a game called "arcane numbers". Th…

Vance and Shackler like playing games. One day, they are playing a game called "arcane numbers". The game is pretty simple, Vance writes down a finite decimal under base A, and then Shackler translates it under base B. If Shackler can translate…

题目:传送门. 题意:将一个A进制下的有限小数转化为B进制看是否仍为有限小数. 题解:一个A进制的小数可以下次 左移动n位变成A进制整数然后再将其转化为B进制即可 即B^m/A^n要整除,因此A的质因子B必须得全部含有. #include <iostream> #include <math.h> #include <string.h> #include <algorithm> #include <stdio.h> #include <std…

http://acm.hdu.edu.cn/showproblem.php?pid=4320 题意: 给出A,B,判断在A进制下的有限小数能否转换成B进制下的有限小数. 思路: 这位博主讲得挺不错的http://blog.csdn.net/dgq8211/article/details/7971960. 我就直接引用了吧... 显然若 n 为整数,一定可以,那么我们下面分析一下 n 含小数的情况. 设 n 的小数部分为 x,且小数部分共 k 位,第 i 位上的数字为 ai. 那么我们可以将 x…

题目传送门 题意:有一个A进制的有限小数,问能否转换成B进制的有限小数 分析:0.123在A进制下表示成:1/A + 2/(A^2) + 3 / (A^3),转换成B进制就是不断的乘B直到为0,即(1/A + 2/(A^2) + 3 / (A^3)) * (B^m).那么(B^m) 一定要能整除(A^n),转换一下就是A的质因子B都有,可以用GCD高效计算 收获:数论题做不来可以找找规律,想想会用什么知识求解 代码: /**************************************…

题目链接: http://acm.hdu.edu.cn/showproblem.php?pid=4321 ------------------------------------------------------------------------------- 虽然有更优美的做法 不过数据范围还是可以数位$DP$的 即把模型转化为 在区间内 $mod\ a  = b\ mod\ a$ 的数所含$1$的个数之和 四维的数组分别记录 枚举到第$x$位 是否达到上限 $mod\ a$ 的余数 当前…

Arcane Numbers 1 Time Limit:1000MS     Memory Limit:32768KB     64bit IO Format:%I64d & %I64u Submit Status Practice HDU 4320 Description Vance and Shackler like playing games. One day, they are playing a game called "arcane numbers". The ga…

在Java位运算总结-leetcode题目博文中总结了Java提供的按位运算操作符,今天又碰到LeetCode中一道按位操作的题目 Given a range [m, n] where 0 <= m <= n <= 2147483647, return the bitwise AND of all numbers in this range, inclusive. For example, given the range [5, 7], you should return 4. 题意:…

Sum of Consecutive Prime Numbers Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 20050   Accepted: 10989 Description Some positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representatio…