#include <iostream>
#include "src\maxim.cpp"
#define Log(x) cout << x << endl;

using namespace std;

void maximum(int a, int b, int c, int d){
   int maxim;
   if( a > b && a > c && a > d )
    maxim = a;
   else if ( b > a && b > c && b > d)
    maxim = b;
   else if (c > a && c > b && c > d)
    maxim = c;
   else if (d > a && d > b && d > c)
    maxim = d;
    cout << maxim;
}


int main()
{
    int a, b, c, d;
    Log(" a: ");
    cin >> a;
    Log(" b: ");
    cin >> b;
    Log(" c: ");
    cin >> c;
    Log(" d: ");
    cin >> d;
    maximum(a, b, c, d);
}