ACM458 - The Decoder

http://icpcres.ecs.baylor.edu/onlinejudge/index.php?option=com_onlinejudge&page=show_problem&problem=399

    #include 
    using namespace std;
    int main(int argc, char *argv[])
    {
        string input;
        int cmt;
        int i;
        while(true)
        {
            cin >> input;
            if(cin.eof())
            {
                break;
            }
            cmt=input.size();
            for(i=0;i < cmt;++i)
            {
                    input[i]-=7;
            }
            cout << input << endl;
        }
    }