#include <bits/stdc++.h>

int main() {
	// std::cin.tie(nullptr)->sync_with_stdio(false);

	int n;
	std::cin >> n;
	std::vector<int> lft, rgt;
	std::vector<std::pair<int, int>> red, blue;
	for (int i = 2; i <= n; ++i) {
		std::cout << "? " << 1 << ' ' << i << std::endl;
		char c;
		std::cin >> c;
		if (c =='R') {
			lft.push_back(i);
			red.emplace_back(1, i);
		} else {
			rgt.push_back(i);
			blue.emplace_back(1, i);
		}
	}
	while (lft.size() && rgt.size()) {
		int u = lft.back(), v = rgt.back();
		std::cout << "? " << u << ' ' << v << std::endl;
		char c;
		std::cin >> c;
		if (c == 'R') {
			rgt.pop_back();
			red.emplace_back(u, v);
		} else {
			lft.pop_back();
			blue.emplace_back(u, v);
		}
	}
	if (lft.size()) {
		std::cout << "!" << std::endl;
		for (auto [u, v] : red) std::cout << u << ' ' << v << std::endl;
	} else {
		std::cout << "!" << std::endl;
		for (auto [u, v] : blue) std::cout << u << ' ' << v << std::endl;
	}
}