S001-AC.cc
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#include <iostream>
using namespace std;
int main()
{
int a,b,c,d,x,y;
cin >> a;
cin >> b;
cin >> c;
cin >> d;
if(a == c && b == d)
{
cout << "= , [" << a << "," << b << "]" << endl;
return 0;
}
else if(a<=d)
{
if(b>=c)
{
if(a<=c && b>=d)
{
cout << "2 , ";
}
else if(a>=c && b<=d)
{
cout << "1 , ";
}
else
{
cout << "? , ";
}
if(a<c)
{
x = c;
}
else
{
x = a;
}
if(d<b)
{
y = d;
}
else
{
y = b;
}
cout << "[" << x << "," << y << "]" << endl;
return 0;
}
}
cout << "? , []" << endl;
return 0;
}