#include<iostream>
using namespace std;

int main(){
	int x,n;
	cout<<"Please enter the value of the \"x\":\n";
	cin>>x;
	cout<<"Please enter the value of the \"n\":\n";
	cin>>n;
	
	double P(int x,int n);
	if(n==0){
		cout<<"P(x)="<<1;
	}
	else if(n==1){
		cout<<"P(x)="<<x;
	}
	else{
		cout<<"P(x)="<<P(x,n);
	}
	return 0;
} 

double P(int x,int n){
	double result = 0.0;
	for(n;n>1;n--){
		result = ((2*n-1)*x-P(x,n-1)-(n-1)*P(x,n-2))/n;
	}
	return result;
}