#include <bits/stdc++.h>
using namespace std;
int main()
{
int a, b, c, d, maxabcd;
cin >> a >> b >> c >> d;
maxabcd=a;
if(maxabcd<b) maxabcd=b;
if(maxabcd<c) maxabcd=c;
if(maxabcd<d) maxabcd=d;
cout << "Max=" << maxabcd << endl;
return 0;
}
Chúc bn học tốt!