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class A
{
public static int operator != (A a, dynamic b)
{
return -1;
}
public static int operator == (A a, dynamic b)
{
return +1;
}
}
public class C
{
public static bool operator == (C a, object b)
{
return ReferenceEquals (a, b);
}
public static bool operator != (C a, dynamic b)
{
return !ReferenceEquals (a, b);
}
public static decimal operator -(dynamic p1, C p2)
{
return 9;
}
public static int Main ()
{
var c = new C ();
var v = 1 - c;
if (v != 9)
return 1;
return 0;
}
}
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