sicily 1020. Big Integer

Description

Long long ago, there was a super computer that could deal with VeryLongIntegers(no VeryLongInteger will be negative). Do you know how this computer stores the VeryLongIntegers? This computer has a set of n positive integers: b1,b2,...,bn, which is called a basis for the computer.

The basis satisfies two properties:
1) 1 < bi <= 1000 (1 <= i <= n),
2) gcd(bi,bj) = 1 (1 <= i,j <= n, i ≠ j).

Let M = b1*b2*...*bn

Given an integer x, which is nonegative and less than M, the ordered n-tuples (x mod b1, x mod b2, ..., x mod bn), which is called the representation of x, will be put into the computer.

Input

The input consists of T test cases. The number of test cases (T) is given in the first line of the input.
Each test case contains three lines.
The first line contains an integer n(<=100).
The second line contains n integers: b1,b2,...,bn, which is the basis of the computer.
The third line contains a single VeryLongInteger x.

Each VeryLongInteger will be 400 or fewer characters in length, and will only contain digits (no VeryLongInteger will be negative).

Output

For each test case, print exactly one line -- the representation of x.
The output format is:(r1,r2,...,rn)

 

求一个大整数对N个数的模，其实关键就只有这两句代码

for( i = 0; i < len; i++ )
    ans = ( ans * 10 + (x[i] - '0') ) % num;

AC代码

#include <stdio.h>
#include <string.h>
int mod( char x[], int num )
{
    int len = strlen(x);
    int ans = 0, i;
    
    for( i = 0; i < len; i++ )
        ans = ( ans * 10 + (x[i] - '0') ) % num;
    
    return ans;
}

int main()
{
    int t, n, b[100], i;
    char x[401];
    
    scanf("%d", &t);
    while ( t-- )
    {
        scanf("%d", &n);
        
        for( i = 0; i < n; i++ )
            scanf("%d", &b[i]); 
           
           scanf("%s", x); 
       
        printf("(");
        for ( i = 0; i < n; i++ )
        {
            if ( i != n - 1 )
                printf("%d,", mod(x, b[i]));
            else
                printf("%d)\n", mod(x, b[i]));
        }
        
    }

    return 0;
}