Exponentiation
Time Limit: 1000/500 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 6948 Accepted Submission(s): 1967
Problem Description 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 R
n 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 R^n. Leading zeros should be suppressed in the output. Insignificant trailing zeros must not be printed. Don't print the decimal point if the result is an integer.
Sample Input
95.123 12
0.4321 20
5.1234 15
6.7592 9
98.999 10
1.0100 12一开始没考虑整数的情况WA一次。。import java.io.*;
import java.util.*;
import java.math.*;
public class Main {
public static void main(String[] args){
Scanner in=new Scanner(System.in);
BigDecimal a;int n,sta,end;
while(in.hasNext()){
int flag=1;
a=in.nextBigDecimal();n=in.nextInt();
String y=new String(a.toPlainString());
for(int i=0;i