我也贴一下

#include <iostream>
using namespace std;

int main()
{
	int queryCount = 0, root = 0;
	cin >> queryCount;
	while (queryCount -- > 0)
	{
		cin >> root;
		int d = root ^ (root | (root - 1));
		cout << root - d << ' ' << root + d << endl;
	}
	return 0;
}