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…

题目传送门 /* 水题:判断前后的差值是否为1,b[i]记录差值,若没有找到,则是第一个出错 */ #include <cstdio> #include <iostream> #include <algorithm> #include <cstring> #include <string> #include <cmath> using namespace std; ; const int INF = 0x3f3f3f3f; int a…

1058 N的阶乘的长度基准时间限制:1 秒 空间限制:131072 KB 分值: 0 难度:基础题 收藏 关注输入N求N的阶乘的10进制表示的长度.例如6! = 720,长度为3.Input输入N(1 <= N <= 10^6)Output输出N的阶乘的长度Input示例6Output示例3思路:位数公式 则有: 循环遍历即可 代码: #include <bits/stdc++.h> using namespace std; int main() { ios::sync_with…

Big Number Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 5930    Accepted Submission(s): 4146 Problem Description As we know, Big Number is always troublesome. But it's really important in our…

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…

题意: 给一个数n,返回该数的阶乘结果是一个多少位(十进制位)的整数. 思路: 用对数log来实现. 举个例子 一个三位数n 满足102 <= n < 103: 那么它的位数w 满足 w = lg103 = 3. 因此只要求lgn 向下取整 +1就是位数.然后因为阶乘比如5阶乘的话是5 * 4 * 3 * 2 * 1.位数就满足lg 5 * 4 * 3 * 2 * 1 = lg5 + lg4 + lg3 + lg2 + lg1.用加法就不会超过数字上限. 当然这是十进制下得.如果是m进制下 ,…

数学题,还是使用log避免大数,但是不要忘记需要+1,因为0也是1位,log(100)= 2,但却是3位. #include <stdio.h> #include <math.h> int main() { int case_n, n; int i; double sum; scanf("%d", &case_n); while (case_n--) { scanf("%d", &n); sum = 1.0f; ; i<…

1. 利用数学公式lg(n!)=lg(2)+lg(3)+....+lg(n) 求解 2.…

High Speed Trains Time Limit: 4000/2000MS (Java/Others)Memory Limit: 128000/64000KB (Java/Others) SubmitStatisticNext Problem Problem Description The kingdom of Flatland has n cities. Recently the king of Flatland visited Japan and was amazed by high…

Big Number Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 40262    Accepted Submission(s): 19637 Problem Description In many applications very large integers numbers are required. Some of these…