424.cpp

/*
   uva 424
   author chm
   */
#include <cctype>
#include <cstdio>
#include <cstring>
#include <cstdlib>
#include <cassert>
#include <list>
#include <queue>
#include <vector>
#include <sstream>
#include <iostream>
#include <algorithm>
using namespace std;
vector<vector<char> > svec;
vector<char> ans;

ostream& operator << (ostream& os, const vector<char>& chvec)
{
    vector<char>::const_iterator ibeg = chvec.begin(),
                                 iend = chvec.end();
    while (ibeg != iend)
        os << *ibeg++;
    os << endl;

    return os;
}

void printans()
{
    int idx = 199;
    while (idx >= 0  && ans[idx] == '0')
        --idx;
    cerr << "idx: " << idx << endl;
    if (idx == -1)              /* all zero */
        cout << 0 << endl;
    else                        /* print nozero part */
    {
        do
        {
            cout << ans[idx] ;
            --idx;
        }
        while (idx >= 0);
        cout << endl;

    }
}


int main()
{
#ifndef ONLINE_JUDGE
    assert(freopen("in", "r", stdin) != NULL);
    assert(freopen("out", "w", stdout) != NULL);
#endif

    svec.resize(200);
    int i = 0;
    ans = vector<char>(200, '0');
    string line;
    while ( cin >> line && line != "0")
    {
        svec[i] = vector<char> (200, '0');
        /* copy the reverse string */
        copy(line.rbegin(), line.rend(), svec[i].begin());
        cerr << svec[i] << endl;
        /* add the input line to sum */
        int cry = 0,
            tsum = 0;
        for (int j = 0; j < 200; ++j)
        {
            tsum = ans[j] - '0' + cry + svec[i][j] - '0';
            ans[j] = tsum % 10 + '0';
            cry = tsum / 10;
        }
        ++i;
    }
    cerr << ans;
    printans();

#ifndef ONLINE_JUDGE
    fclose(stdout);
    assert(freopen("/dev/tty", "w", stdout) != NULL);
    system("diff standard out");
#endif
    return 0;
}