C :

int main(){
    int n,m,count = 0,i;
    int a[10]={0};
    scanf("%d",&n);
    m = n>0?n:-n;
    while(m!=0)
    {
        a[m%10]++;
        m = m/10;
        count++;
    }
    printf("%d: %d bits\n",n,count);
    for(i = 0;i <10;i++)
    {
        if(a[i]!=0)printf("%d: %d\n",i,a[i]);
    }
   return 0;
}