10494 - If We Were a Child Again

#include <cstdio>
#include <cstring>
int main()
{
long long int count,i,num,l;
int n,flag;
char x[10000];
long long int str[10000];
char c;
memset(x,0,sizeof(x));
memset(str,0,sizeof(str));
while(scanf("%s %c %d",x,&c,&n)!=EOF)
{
count=flag=num=0;
for(i=0; i<strlen(x); i++)
{
num=num*10+x[i]-'0';
l=num/n;
if(l!=0||(l==0&&flag==1))
{
str[count++]=l;
flag=1;
}
num%=n;
}
if(c=='%')printf("%lld\n",num);
else
{
if(count==0)printf("0");
else for(i=0; i<count; i++)printf("%lld",str[i]);
printf("\n");
}
memset(x,0,sizeof(x));
memset(str,0,sizeof(str));
}
return 0;
}