1212

#include<iostream>
#include<cmath>

using namespace std;
void kal1(int *u, int n) {

	float* mas = new float[n];

	for (int i = 0; i < n; i++) {
		cin >> mas[i];
		*u *= mas[i];
	}

}
void kal2(int *v, int m) {

	float* mas = new float[m];

	for (int i = 0; i < m; i++) {
		cin >> mas[i];
		*v *= mas[i];
	}
}

int main()
{
int u = 1, v = 1;

	int n, m;


	cout << "n:";
	cin >> n;

	cout << "m:";
	cin >> m;

	kal1(&u,n);
	kal2(&v,m);
	cout << pow(u,1.0/m)-pow(v,1.0/n);
}