C++ :

#include<cstdio>
#include<cmath>
#include<iostream>
using namespace std;
int main()
{
    double a,b;
    while(scanf("%lf%lf",&a,&b)!=EOF)
    {
        printf("%.0lf\n",pow(b,1.0/a));
       // cout<<pow(b,1.0/a)<<endl;
    }
}

Java :

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n;
		double m;
		while (sc.hasNext()) {
			n = sc.nextInt();
			m = sc.nextDouble();
			m = Math.pow(m, 1.0 / n);
			System.out.println(Math.round(m));
		}
	}
}