杭电 —1212 大数取模
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Big Number
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 7152 Accepted Submission(s): 4934
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.
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
2 312 7152455856554521 3250
Sample Output
251521
Author
Ignatius.L
Source
杭电ACM省赛集训队选拔赛之热身赛
解题思路:这道题用的求模思路和我们平时进行的除法的套路是一样的。
先是第一个数取模,然后乘10加上后面的数接着取模,往后类推。
AC代码:
#include<stdio.h>#include<string.h>int main(){ char a[1100]; int b,i; while(scanf("%s%d",a,&b)!=EOF) { int len=strlen(a); int sum=0; for(i=0;i<len;i++) { sum=sum*10+a[i]-'0'; sum=sum%b; } printf("%d\n",sum); } return 0;}
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