#include <iostream>

#include <string>

#include <cstring>

#include <cstdio>

#include <cstdlib>

#define N 10050

using namespace std;

string s;

int ans[N];

int main()

{

    int i, j;

    while (cin>>s, s[] != '')

    {

        for (i = s.length() - , j = ; i >= ; i--, j++)

            ans[j] += (s[i] - '');

    }

    for (i = ; i < N - ; i++)

    {

        ans[i + ] += ans[i] / ;

        ans[i] %= ;

    }

    i = N - ;

    while (!ans[i] && i > )

        i--;

    while (i >= )

        cout<<ans[i--];

    cout<<endl;

    return ;

}

#include <iostream>

#include <string>

#include <cstring>

#include <algorithm>

#include <cstdio>

#include <cstdlib>

#define N 550

using namespace std;

int ans[N];

string s1, s2;

int main()

{

    int i, j, ls1, ls2, len;//tmp表示进位

    while (cin>>s1>>s2)

    {

        ls1 = s1.length() - ;

        ls2 = s2.length() - ;

        len = ls1 + ls2;

        memset(ans, , sizeof(ans));

        for (i = ls1; i >= ; i--)

            for (j = ls2; j >= ; j--)

            {

                ans[len - (i + j)] += (s1[i] - '') * (s2[j] - '');

            }

        len++;

         for (i = ; i < len; i++)

         {

             ans[i + ] += ans[i] / ;

             ans[i] = ans[i] % ;

         }

         while (!ans[len] && len > )//去除前导0

            len--;

         for (; len >= ; len--)

            cout<<ans[len];

         cout<<endl;

    }

    return ;

}

int main()

{

    //ifstream cin("test.in");

    bign a, b, c;

    char ch;

    bign d = INT_MAX;

    string sa, sb;

    while (cin>>sa>>ch>>sb)

    {

        cout<<sa<<' '<<ch<<' '<<sb<<endl;

        a = sa;

        b = sb;

        if (d < a)

            cout<<"first number too big"<<endl;

        if (d < b)

            cout<<"second number too big"<<endl;

        if (ch == '+')

            c = a + b;

        else

            c = a * b;

        cout<<c<<endl;

        if (d < c)

            cout<<"result too big"<<endl;

    }

    return ;

}

int main()

{

    string sa, sb;

    bign a, b;

    int p, n, i;

    while (cin>>sa>>n)

    {

        p = ;

        while (sa[p] != '.')

            p++;

        sa.erase(sa.begin() + p);

        a = sa;

        b = a ^ n;

        sb = b.to_str();

        p = ( - p) * n;

        for (i = b.length(); i < p; i++)

            sb += '';

        sb.insert(sb.begin() + p, '.');

        p = ;

        while (sb[p] == '')

            p++;

        for (i = sb.length() - ; i >= p; i--)

            cout<<sb[i];

        cout<<endl;

    }

    return ;

}

int main()

{

    //string sa, sb;

    bign a, b, c;

    char ch;

    while (cin>>a>>ch>>b)

    {

        if (ch == '/')

            c = a / b;

        else

            c = a % b;

        cout<<c<<endl;

    }

    return ;

}