Apart from the novice programmers, all others know that you can’t exactly represent numbers raised to some high power. For example, the C function pow(125456, 455) can be represented in double datatype format, but you won’t get all the digits of the…

题目: 求n的k次方,然后将答案用前三位和最后三位表示. Sample Input 2 123456 1 123456 2 Sample Output 123...456 152...936 分析: 题目中其实有提示,用double来表示n的k次方,double神奇的地方在于能转化为string类型的字符串.用到了sprintf这个函数.代码: #include <cstdio> #include <iostream> #include <cstring> using…

链接:http://vjudge.net/problem/viewProblem.action?id=19597 描述:求n^k的前三位数字和后三位数字 思路:题目要解决两个问题.后三位数字可以一边求高次幂一边取模,下面给出求前三位数字的方法. n^k = (10^lg n)^k = 10^(k*lg n) 为了描述方便,令X=n^k .则 lg X 的整数部分表示X有多少位.设整数部分为zs,小数部分为xs,则X=(10^zs)*(10^xs) . (10^zs)的形式就是100--,跟X的位…

http://lightoj.com/volume_showproblem.php?problem=1282 Leading and Trailing Time Limit:2000MS     Memory Limit:32768KB     64bit IO Format:%lld & %llu Submit Status Practice LightOJ 1282 Description You are given two integers: n and k, your task is t…

[LightOJ1282]Leading and Trailing(数论) 题面 Vjudge 给定两个数n,k 求n^k的前三位和最后三位 题解 这题..真的就是搞笑的 第二问,直接输出快速幂\(mod \ 1000\)的值,要补前导零 第一问...就是搞笑的 依旧是快速幂 但是用double来算 每次中间值只要大于1000 直接除得小于1000就行了 不会就看代码把.. 这题就是搞笑的... #include<iostream> #include<cstdio> #includ…

Leading and Trailing https://vjudge.net/contest/288520#problem/E You are given two integers: n and k, your task is to find the most significant three digits, and least significant three digits of nk. Input Input starts with an integer T (≤ 1000), den…

Leading and Trailing You are given two integers: n and k, your task is to find the most significant three digits, and least significant three digits of nk. Input Input starts with an integer T (≤ 1000), denoting the number of test cases. Each case st…

/** 题目:E - Leading and Trailing 链接:https://vjudge.net/contest/154246#problem/E 题意:求n^k得前三位数字以及后三位数字,保证一定至少存在六位. 思路:后三位求法只要不断对1000取余就行了. 前三位求法: 对一个数x,他可以用科学计数法表示为10^r*a (r为次方,1<=a<10) 设:n^k = x = 10^r*a 两边取对数: k*log10(n) = log10(x) = r+log10(a); 令y =…

Leading and Trailing You are given two integers: n and k, your task is to find the most significant three digits, and least significant three digits of nk. Input Input starts with an integer T (≤ 1000), denoting the number of test cases. Each case st…

题目链接:https://vjudge.net/problem/LightOJ-1282 1282 - Leading and Trailing    PDF (English) Statistics Forum Time Limit: 2 second(s) Memory Limit: 32 MB You are given two integers: n and k, your task is to find the most significant three digits, and le…