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HDOJ 2117 Just a Numble(模拟除法)

钵仔糕的波波仔 2022-05-14 阅读 38


Problem Description

Now give you two integers n m, you just tell me the m-th number after radix point in 1/n,for example n=4,the first numble after point is 2,the second is 5,and all 0 followed

Input

Each line of input will contain a pair of integers for n and m(1<=n<=10^7,1<=m<=10^5)

Output

For each line of input, your program should print a numble on a line,according to the above rules

Sample Input

4 2

5 7

123 123

Sample Output

5

0

8

开始想用JAVA的大数做的,可是超时了。。。

所以只有走上算法的路,用了模拟。

import java.util.Scanner;

public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
while(sc.hasNext()){
int n = sc.nextInt();
int m = sc.nextInt();
int sum = 1;
int t=0;
for(int i=0;i<m;i++){
if(sum==0){
t=0;
break;
}
sum = sum*10;
t = sum/n;
sum = sum%n;

}
System.out.println(t%10);
}

}

}



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