#include <iostream>
using namespace std;

int main() {
	int n, v[11], w[11];
	cin >> n;
	for (int i = 1; i <= n; ++i) {
		cin >> v[i];
	}
	for (int i = 1; i <= n; ++i) {
		cin >> w[i];
	}
	int sort = 1;
	while (sort == 1) {
		sort = 0;
		for (int i = 1; i < n; ++i) {
			if (w[i] < w[i + 1]) {
				int aux = w[i];
				w[i] = w[i + 1];
				w[i + 1] = aux;
				sort = 1;
			}
		}
	}
	int cont = 0;
	for (int i = 1; i <= n; ++i) {
		for (int j = 1; j <= n; ++j) {
			if (v[i] == w[j] && v[i] > v[i + 1]) {
				++cont;
				break;
			}
		}
	}
	if (cont != n) {
		cout << "NU";
	} else {
		cout << "DA";
	}
	return 0;
}