UVA - 748 Exponentiation
Problems involving the computation of exact values of very large magnitude and precision are common. For example, the computation of the national debt is a taxing experience for many computer systems.
This problem requires that you write a program to compute the exact value of Rn where R is a real number (0.0 < R < 99.999) and n is an integer such that 0 < n ≤ 25.
Input
The input will consist of a set of pairs of values for R and n. The R value will occupy columns 1 through 6, and the n value will be in columns 8 and 9.
Output
The output will consist of one line for each line of input giving the exact value of Rn. Leading zeros and insignificant trailing zeros should be suppressed in the output.
Sample Input
95.123 12 0.4321 20 5.1234 15 6.7592 9 98.999 10 1.0100 12
Sample Output
548815620517731830194541.899025343415715973535967221869852721 .00000005148554641076956121994511276767154838481760200726351203835429763013462401 43992025569.928573701266488041146654993318703707511666295476720493953024 29448126.764121021618164430206909037173276672 90429072743629540498.107596019456651774561044010001 1.126825030131969720661201
有趣的大数幂运算,如果直接用BigDecimal的话会错误,需要进行一点小小的处理。
import java.math.BigDecimal; import java.util.Scanner; /** * * @author Asimple * @date ${date} * */ public class Main{ public static BigDecimal fun(BigDecimal num, int n) { if( n==1 ) return num; if( n%2==0 ) return fun(num,n/2).multiply(fun(num,n/2)); else return fun(num,n/2).multiply(fun(num,n/2)).multiply(num); } static Scanner sc = new Scanner(System.in); public static void main(String[] args) { BigDecimal a; int n; while( sc.hasNext() ) { a = sc.nextBigDecimal(); n = sc.nextInt(); String ans = ""; ans = fun(a,n).stripTrailingZeros().toPlainString(); if(ans.charAt(0) == '0') { int i; for(i=0; i<ans.length(); i++) if(ans.charAt(i) != '0') break; System.out.println(ans.substring(i)); } else System.out.println(ans); } } }
低调做人,高调做事。
【推荐】国内首个AI IDE,深度理解中文开发场景,立即下载体验Trae
【推荐】编程新体验,更懂你的AI,立即体验豆包MarsCode编程助手
【推荐】抖音旗下AI助手豆包,你的智能百科全书,全免费不限次数
【推荐】轻量又高性能的 SSH 工具 IShell:AI 加持,快人一步
· 基于Microsoft.Extensions.AI核心库实现RAG应用
· Linux系列:如何用heaptrack跟踪.NET程序的非托管内存泄露
· 开发者必知的日志记录最佳实践
· SQL Server 2025 AI相关能力初探
· Linux系列:如何用 C#调用 C方法造成内存泄露
· 终于写完轮子一部分:tcp代理 了,记录一下
· 震惊!C++程序真的从main开始吗?99%的程序员都答错了
· 别再用vector<bool>了!Google高级工程师:这可能是STL最大的设计失误
· 单元测试从入门到精通
· 【硬核科普】Trae如何「偷看」你的代码?零基础破解AI编程运行原理
2016-05-24 ACM题目————Equations
2016-05-24 ACM题目————STL练习之Ananagrams