HDU 1212 Big Number 大数求余数
2014-06-28 18:36
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Big Number
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4522 Accepted Submission(s): 3129
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
/* HDU 1212 Big Number (大数的余数) 看别人的 举个例子,1314 % 7= 5 1314= ((1*10+3)*10+1)*10+4 所以有 1314 % 7= (((1 * 10 % 7 +3 )*10 % 7 +1)*10 % 7 +4)%7 */ #include<iostream> #include<cstring> using namespace std; int main(){ int i,num,pos,n; char str[1001]; while(scanf("%s%d",str,&n)!=EOF) { num=0; for(i=0;i<strlen(str);i++) { num=(num*10+str[i]-'0')%n; } printf("%d\n",num); } return 0; }
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