WA in CFRAC :(

[ankras]

Please give some hint, why i m getting WA

#include<stdio.h>
int l(int x){
    int y=0;
    while (x){
       y++;
       x/=10;
    }
    return y;
}
long long unsigned int a[10000000];
int main(){
    long long unsigned int i, j, k, t, p, q, x, y, m, len, r, test=1LL;
    while(scanf("%llu %llu",&p,&q)){
       if(!p && !q)
          break;
       printf("Case %llu:\n%llu / %llu\n",test++,p,q);
       for (i=0; ; i++){
         a[i]=p/q;
         r=p;
         p=q;
         q=(r%p); 
         if(q==0)break;
         if(p%q==0){
             a[i+1]=(p/q)-1;
             a[i+2]=1;
             break;
         }
       }
       if(q==0){len =0LL; len = 3+l(a[0]); 
                    for (m=0; m<len; m++) printf(".");
                    printf("1\n");
                    printf("%llu.+.-\n",a[0]-1);
                    for (m=0; m<len; m++) printf(".");
                    printf("1\n");
                    continue;
                    }
       i+=2;
       len=0LL;
       for (j=0; j<=i; j++){
          len+=l(a[j]);
       }
       len += 3*i;
       j = 2*i+1;
       t=0LL;
       for (k=0; k<j-1; k++){
         if(k%2==0){
           x=l(a[k/2])+3+t;
           y=(len-x)/2;
           if(len>(x+y+y)){
           for (m=0; m<(y+x); m++) printf(".");
           printf("1");
           for (m; m<len-1; m++) printf(".");}
           else{
                for (m=0; m<(y+x)-1; m++) printf(".");
           printf("1");
           for (m; m<len-1; m++) printf(".");
                }
           printf("\n");
         }
         else{
              while(t--)
                printf(".");
              printf("%llu.+.",a[k/2]);
              t=x;
              for (m=0; m<(len-x); m++) printf("-");
              printf("\n");
         }
       }
       len--;
       while(len--)
         printf(".");
       printf("1\n");
    }
    return 0;
}