呵呵,这个翻译还是很直白的嘛,大家意会就好. 第一次看到这个高大上题目还是有点小害怕的,还好题没有做过深的文章. 只要按照规则转化成十进制就好了,而且题目本身也说了最大不超过一个int的范围(2^31-1 == 2147483647). 直接位运算就好了.   Skew Binary  When a number is expressed in decimal, the k-th digit represents a multiple of 10k. (Digits are numbered f…

题意:根据这种进制的算法,例如,给你一个左式,要求推出右式.(其实右式就是一个十进制数,根据这种进位的方法来转成特殊进制的数.) 思路:观察转换特点,有点类似于二进制,但是其在后面还减一了.比如25-1.24-1 ...21-1.如果我们不减1会怎样?如上式,从左边看起,就会多加了(25-1)*1+1*(23-1)+2*(22-1).这就是说,我们可以先将 10120 从右往左逐个乘以21  22  23  24  25 再减去10120即可得出结果. 当然也可以按照上边式子老实计算. #inc…

/*将数字存储在数组中 #math.h strlen(a)=len sum=0 for(i=0;i<len;i++) sum+=a[i]*(pow(2,len-i)-1)*/ #include <stdio.h> #include <stdlib.h> #include<string.h> #include<math.h> int main() { int len,i; ]; ]; while(scanf("%s",arr)!=EO…

UVA.11806 Cheerleaders (组合数学 容斥原理 二进制枚举) 题意分析 给出n*m的矩形格子,给出k个点,每个格子里面可以放一个点.现在要求格子的最外围一圈的每行每列,至少要放一个点,并且放在角上的点,同时算那个角所在的行和所在的列.不允许剩下点,求总共的方案数量,结果对1000007取模. 数据范围2 ≤ M,N ≤ 20,K ≤ 500. 考虑到要求组合数目,首先就需要预处理500以内的组合数.正向求解可能有些困难,这样考虑: 不管三七二十一,先求解出所有情况的总和,即C…

[067-Add Binary(二进制加法)] [LeetCode-面试算法经典-Java实现][全部题目文件夹索引] 原题 Given two binary strings, return their sum (also a binary string). For example, a = "11" b = "1" Return "100" 题目大意 给定两个二进制的字符串,返回它们的和,也是二进行制字符串. 解题思路 先将相应的两个二进制字符…

Skew Binary Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 10676   Accepted: 6807 Description When a number is expressed in decimal, the kth digit represents a multiple of 10k. (Digits are numbered from right to left, where the least si…

[简要题意]:第二个是数字系统的代表性的定义.而给了你这个号码系统提示的形式和十进制转换之间的关系.现在给你一些这样的系统.让你把它变成2二进制输出. [分析]:当中 base[k]  =  2^(k+1)-1  =  2(2^k-1)+1  =  2base[k-1]+1 // 200K 0Ms #include<iostream> #include<cstring> using namespace std; int main() { int i,k,base[31],sum;…

Given two integers L and R, find the count of numbers in the range [L, R] (inclusive) having a prime number of set bits in their binary representation. (Recall that the number of set bits an integer has is the number of 1s present when written in bin…

Given a positive integer N, find and return the longest distance between two consecutive 1's in the binary representation of N. If there aren't two consecutive 1's, return 0. Example 1: Input: 22 Output: 2 Explanation: 22 in binary is 0b10110. In the…

［抄题］: Given two integers L and R, find the count of numbers in the range [L, R] (inclusive) having a prime number of set bits in their binary representation. (Recall that the number of set bits an integer has is the number of 1s present when written…