官方是不是不认ifstream和ofstream？

#include <fstream>
using namespace std;

int main()
{
	auto in = ifstream("cake.in");
	int t;
	in >> t;
	auto out = ofstream("cake.out");
	for (int i = 0; i < t; i++)
	{
		int a, b, c;
		in >> a >> b >> c;
		if (a == 0 && b == 0 || a == 0 && c == 0 || b == 0 && c == 0)
		{
			out << 0 << endl;
		}
		else if (a == 0 || b == 0 || c == 0)
		{
			if (a == b || b == c || a == c)
			{
				out << 1 << endl;
			}
			else
			{
				out << 2 << endl;
			}
		}
		else
		{
			if (a == b || b == c || a == c)
			{
				out << 2 << endl;
			}
			else if (a + b == c || a + c == b || b + c == a)
			{
				out << 2 << endl;
			}
			else
			{
				out << 3 << endl;
			}
		}
	}
	
	return 0;
}