import std.array, std.conv, std.stdio, std.typecons;

alias Vert = ulong;
alias Edge = Tuple!(Vert, Vert);
alias Face = Tuple!(Vert, Vert, Vert);

void main() {
	auto Q = readln[0 .. $-1].to!ulong;
	bool[Vert] V;
	bool[Edge] E;
	bool[Face] F;
	foreach (_; 0 .. Q) {
		auto ABC = readln.split.to!(Vert[]);
		auto A = ABC[0], B = ABC[1], C = ABC[2];
		assert(A < B && B < C);
		V[A] = V[B] = V[C] = true;
		E[Edge(A, B)] = E[Edge(B, C)] = E[Edge(A, C)] = true;
		F[Face(A, B, C)] = true;
	}
	writeln(V.length - E.length + F.length);
}