Probnik

#include "stdafx.h"
#include <iostream>
using namespace std;
int max(int a, int b)
{
    if (a > b) {
        return a;
    }
    else {
        return b;
    }
    int main()
    {
        int a;
        int b;
        int c;
        int d;
        cin >> a;
        cin >> b;
        cin >> c;
        cin >> d;
        cout << max(a, max(b, max(c, d)));
    }
    return 0;
}