#include <iostream>
#include <vector>
#include <cmath>

int N;

int q(int a, int b) {
	if (a > b) std::swap(a, b);
	int p;
	std::cout << "? " << N - a - 1 << ' ' << N - b - 1 << std::endl;
	std::cin >> p;
	return p;
}

int main() {
	std::cin >> N;
	std::vector<int> d(N);
	if (N == 2) {
		int p = q(0, 1);
		int r = sqrt(p);
		std::cout << "! ";
		if (r * r == p && (r == 1 || r == 5 || r == 7 || r == 8 || r == 9)) {
			std::cout << r << r << std::endl;
		} else {
			std::cout << -1 << std::endl;
		}
	} else {
		int i = 0, i2 = -1, i3 = -1, p1, p2, p3;
		while(++i < N) {
			p3 = q(0, i);
			if (p3 != 0) {
				i2 = i;
				break;
			}
			d[i] = 0;
		}
		while(++i < N) {
			p2 = q(0, i);
			if (p2 != 0) {
				i3 = i;
				break;
			}
			d[i] = 0;
		}
		if (i3 == -1) {
			std::cout << "! ";
			if (i2 == -1) {
				std::cout << -1;
			} else {
				int r = sqrt(p3);
				if (r * r == p3 && (r == 1 || r == 5 || r == 7 || r == 8 || r == 9)) {
					d[0] = d[i2] = r;
					for (i = 0; i < N; ++i) {
						std::cout << d[i];
					}
				} else {
					std::cout << -1;
				}
			}
			std::cout << std::endl;
			return 0;
		}
		p1 = q(i2, i3);
		d[0] =  std::sqrt(p2 * p3 / p1);
		d[i2] = std::sqrt(p3 * p1 / p2);
		d[i3] = std::sqrt(p1 * p2 / p3);
		while(++i < N) {
			d[i] = q(0, i) / d[0];
		}
		std::cout << "! ";
		for (i = 0; i < N; ++i) {
			std::cout << d[i];
		}
		std::cout << std::endl;
	}
}