Sum of divisors

Problem Description

mmm is learning division, she's so proud of herself that she can figure out the sum of all the divisors of numbers no larger than 100 within one day!
But her teacher said "What if I ask you to give not only the sum but the square-sums of all the divisors of numbers within hexadecimal number 100?" mmm get stuck and she's asking for your help.
Attention, because mmm has misunderstood teacher's words, you have to solve a problem that is a little bit different.
Here's the problem, given n, you are to calculate the square sums of the digits of all the divisors of n, under the base m.

 

Input

Multiple test cases, each test cases is one line with two integers.
n and m.(n, m would be given in 10-based)
1≤n≤10⁹
2≤m≤16
There are less then 10 test cases.

 

Output

Output the answer base m.

 

Sample Input

10 2

30 5

 

Sample Output

110

112

 

Hint

Use A, B, C...... for 10, 11, 12...... Test case 1: divisors are 1, 2, 5, 10 which means 1, 10, 101, 1010 under base 2, the square sum of digits is 1^2+ (1^2 + 0^2) + (1^2 + 0^2 + 1^2) + .... = 6 = 110 under base 2.

 

#include <stdio.h>

int change(int number,int m);

int main(){
    int n;
    int m;
    int i;
    int j;
    int length;
    int sum;
    int temp;
    char s[100];        
    
    while(scanf("%d%d",&n,&m)!=EOF){
        sum=0;
        for(i=1;i*i<=n;i++){  //这里i*i<=n，如果i从1到n则超时 
            if(n%i==0){
                temp=change(i,m);    
                sum+=temp;
                
                if(i!=n/i){  //如果i和n/i相等则算一次 
                    temp=change(n/i,m);
                    sum+=temp;
                }
            }
        }
        
        i=0;
        while(sum){
            temp=sum%m;
            
            if(temp<=9)
                s[i]=temp+'0';
                
            else if(temp==10)
                s[i]='A';
                
            else if(temp==11)
                s[i]='B';
                
            else if(temp==12)
                s[i]='C';
                
            else if(temp==13)
                s[i]='D';
                
            else if(temp==14)
                s[i]='E';
                
            else if(temp==15)
                s[i]='F';
                
            i++;
            sum/=m;
        }
        
        length=i;
        
        for(i=length-1;i>=0;i--)
            printf("%c",s[i]);
        
        printf("
");
    }
    
    return 0;
} 

int change(int number,int m){
    int temp;
    int result;
    
    result=0;
    while(number){
        temp=number%m;
        result+=temp*temp;
        number/=m;
    }
    return result;
}