#include <fstream>

using namespace std;

int main()
{
    ifstream data("data.cpp");
    ofstream out("out.txt");
    int flag = 0;
    char temp;
    while (!data.eof())
    {
        data >> temp;
        switch (flag)
        {
        case 0:  //поиск математических выражений и начала числа
            if ((temp == '*') || (temp == '/') || (temp == '-') || (temp == '+') || (temp == '&') || (temp == '^'))
                out << temp;
            else
                if (temp == '0')
                {
                    flag = 1;
                }
            break;
        case 1:
            if (temp >= '1' && temp <= '7')
            {
                out << '0' << temp;
                flag = 2;
            }
            else
            {
                flag = 0;
                if ((temp == '*') || (temp == '/') || (temp == '-') || (temp == '+') || (temp == '&') || (temp == '^'))
                    out << temp;
            }
            break;
        case 2: //проверка не кончилось ли число
            if (temp >= '0' && temp <= '7')
                out << temp;
            else
            {
                flag = 0;
                if ((temp == '*') || (temp == '/') || (temp == '-') || (temp == '+') || (temp == '&') || (temp == '^'))
                    out << temp;
            }
            break;
        }
    }
    return 0;
}