#include <stdio.h>
#include <string.h>


const int ksize = 1000;

class Huge{
public:
    int a[ksize];

    void Reset(){
        memset(a,0,sizeof(a));
        a[0]=1;
    }
    Huge(){
        Reset();
    }

    void setValue(int x){
        Reset();
        a[0]=0;
        do{
            a[0]++;
            a[a[0]] = x % 10;
            x/=10;
        }while(x);
    }
    void operator +=(const Huge &other){
        int i, t= 0;
        for(i = 1; i <= a[0] || i <= other.a[0] || t != 0;i++, t/=10)
        {
            a[i] = (t+= a[i] + other.a[i]) % 10;
        }
        a[0] = i - 1;
    }

    void operator -=(const Huge &other){
        int i, t =0;
        for(i=1;i<= a[0];i++)
        {
            a[i] = (a[i] - t) - other.a[i];

            if(a[i] < 0)
                t = 1;
            else
                t = 0;
            a[i] += t * 10;

        }
        while(a[0] > 1 && (a[a[0]] == 0))
            a[0]--;
    }

    void operator *=(const int x){
        int i, t = 0;
        for(i = 1; i <= a[0]; i++, t/=10)
        {
            a[i] = (t+= a[i] * x) % 10;
        }
        a[0] = i -1;
        while(t)
        {
            a[++a[0]] = t % 10;
            t/=10;
        }
    }

    void operator *=(const Huge &other)
    {
        int i,j,t=0;
        Huge aux;
        for(i=1; i<=a[0] ; i++)
            for(j = 1, t = 0; j <= other.a[0] || t ; j++, t/=10)
                aux.a[i+j-1] = (t += aux.a[i+j-1] + a[i] * other.a[j]) % 10;

        if(i + j - 3 > aux.a[0])
            aux.a[0] = i + j - 3;

        Reset();
        for(i = 1; i<= aux.a[0]; i++)
            a[i] = aux.a[i];
        a[0] = aux.a[0];
    }


    void addInteger(int x)
    {
        int i, t= 0;
        for(i = 1; i<= a[0] || x!=0 || t!= 0; i++, t/=10, x/=10)
        {
            a[i] = (t += a[i] + x % 10) % 10;
        }
        a[0] = i - 1;
    }

    void printNumber()
    {
        int i;
        for(i = a[0]; i >= 1; i--)
            printf("%d",a[i]);
    }


};