3.
#include <iostream>
using namespace std;
int main()
{
float a, b;
cin >> a >> b;
if (a > b)
{
cout << a;
}
else
{
cout << b;
}
return 0;
}
4.
#include <iostream>
using namespace std;
int main()
{
int a, b, c;
cin >> a >> b >> c;
if (c >= a && c <= b)
{
cout << "Da";
}
else
{
cout << "Nu";
}
return 0;
}