Just a Numble(求小数的第N位数)
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Just a Numble
Time Limit: 3000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2410 Accepted Submission(s): 1160
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 25 7123 123
Sample Output
508
#include<stdio.h>int main(){int n,m,i,j,sum;int k;while(scanf("%d%d",&n,&m)!=EOF){sum=1;for(i=0;i<m;i++){sum=sum*10;//这个题的意思是让每一位都X10,比如求得第一位k=sum/n;//k即为第一位小数sum=sum%n;//求得余数,还得让余数继续除以n也很好理解!}printf("%d\n",k%10);}}
也很好理解的,不过最好还是借用一下画画来更加清晰地认识!
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