#include <iostream>

using namespace std;

int main()
{
    int currV, maxSoFar = -1;

    if (cin >> currV && currV >= 0)
    {
        maxSoFar = currV;
        while (cin >> currV && currV >= 0)
        {
            if (currV > maxSoFar)
            {
                maxSoFar = currV;
            }
        }
    }

    cout << "Max: " << maxSoFar;
}