#include <string>
            #include <sstream>
            #include <fstream>
            #include <iterator>
            #include <vector>
            #include <algorithm>
            #include <iostream>
     
            using namespace std;
     
            int main()
            {
                std::string line;
                while(std::getline(cin, line)) 
                {
                    std::stringstream str(line);
                    std::istream_iterator<int> inf(str), eof;
                    std::vector<int> vec(inf, eof);
                    std::cout << *std::max_element(vec.begin(), vec.end()) << std::endl;
                }
            }