Problem Description In many applications very large integers numbers are required. Some of these applications are using keys for secure transmission of data, encryption, etc. In this problem you are given a number, you have to determine the number of…

题目链接:http://acm.nefu.edu.cn/JudgeOnline/problemShow.php?problem_id=117 Time Limit:1000ms Memory Limit:65536K Description 小明是一个聪明的孩子,对数论有着很浓烈的兴趣.他发现求1到正整数10n 之间有多少个素数是一个很难的问题,该问题的难以决定于n 值的大小.现在的问题是,告诉你n的值,让你帮助小明计算小于10n的素数的个数值共有多少位? Input 输入数据有若干组,每组数据…

Big Number Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 35382    Accepted Submission(s): 16888 Problem Description In many applications very large integers numbers are required. Some of these…

平衡数的定义是指,以某位作为支点,此位的左面(数字 * 距离)之和 与右边相等,距离是指某位到支点的距离; 题意:求区间内满足平衡数的数量 : 分析:很好这又是常见的数位dp , 不过不同的是我们这次需要枚举是哪个位置是平衡点 , 一开始我是想说搜索到最后以为 ,然后得到这个数的位数 ,在判断平衡位置 , 想到这样的话 , 这就说明了我对数位dp 还是不太熟悉的 ,因为这样的话dfs() 里面的sum , emmm是找不到状态的 : 正解: 依然是枚举平衡点的位置  ,这个思路没有问题 , 但是…

Big Number Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 26383    Accepted Submission(s): 12006 Problem Description In many applications very large integers numbers are required. Some of thes…

Different GCD Subarray Query Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others)Total Submission(s): 221    Accepted Submission(s): 58 Problem Description This is a simple problem. The teacher gives Bob a list of probl…

[本文链接] http://www.cnblogs.com/hellogiser/p/single-number-of-array-with-other-three-times.html [题目] int类型数组中除了一个数出现一次或两次以外,其他数都出现三次,求这个数. [分析]  C++ Code  123456789101112   int singleNumber(int *a, int n) {     ;     ; i < n; i++)     {         ones = …

题目链接:http://lightoj.com/volume_showproblem.php?problem=1024 题意:给你n(2<=n<=1000)个数, 然后求n个数的最小公倍数,每个数的大小是1---10000;所以答案会很大,可能达到1000个4位数相乘:所以结果很大,将近4000位; 所以一定会涉及到高精度运算:同时我们也不能直接循环求最小公倍数:我们可以把一个数分解成多个质数相乘,然后找到所有数中,出现的质数最多的那个对应的次方,然后再把结果乘起来即可; 例如样例 4 5 6…

HDU 1711 Number Sequence(数列) Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) [Description] [题目描述] Given two sequences of numbers : a[1], a[2], ...... , a[N], and b[1], b[2], ...... , b[M] (1 <= M <= 10000, 1 <= N…

HDU 1005 Number Sequence(数列) Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others) [Description] [题目描述] A number sequence is defined as follows: f(1) = 1, f(2) = 1, f(n) = (A * f(n - 1) + B * f(n - 2)) mod 7. Given A, B, an…