hdoj1212Big Number


Problem Description
As we know, Big Number is always troublesome. But it's really important in our ACM. And today, your task is to write a program to calculate A mod B.

To make the problem easier, I promise that B will be smaller than 100000.

Is it too hard? No, I work it out in 10 minutes, and my program contains less than 25 lines.
 

Input
The input contains several test cases. Each test case consists of two positive integers A and B. The length of A will not exceed 1000, and B will be smaller than 100000. Process to the end of file.
 

Output
For each test case, you have to ouput the result of A mod B.
 

Sample Input
   
   
   
   
2 3 12 7 152455856554521 3250
 

Sample Output
   
   
   
   
2 5 1521
代码:
#include<stdio.h> int main() {     char a[1005];     int b,c;     while(scanf("%s %d",a,&b)!=EOF)     {         long long sum=0;         for(int i=0;a[i]!='\0';i++)         {             sum=(sum*10+a[i]-'0')%b;                 }         printf("%d\n",sum%b);     }     return 0; }
思路:每一步都去余,防止爆掉

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