#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;
}
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