Problem:
Score : 300 points

Problem Statement

There are N integers a_1, a_2, ..., a_N not less than 1.
The values of a_1, a_2, ..., a_N are not known, but it is known that a_1 \times a_2 \times ... \times a_N = P.

Find the maximum possible greatest common divisor of a_1, a_2, ..., a_N.

Constraints

1 \leq N \leq 10^{12}

1 \leq P \leq 10^{12}

Input

Input is given from Standard Input in the following format:

N P

Output

Print the answer.

Sample Input 1

3 24

Sample Output 1

2

The greatest common divisor would be 2 when, for example, a_1=2, a_2=6 and a_3=2.

Sample Input 2

5 1

Sample Output 2

1

As a_i are positive integers, the only possible case is a_1 = a_2 = a_3 = a_4 = a_5 = 1.

Sample Input 3

1 111

Sample Output 3

111

Sample Input 4

4 972439611840

Sample Output 4

206

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)

import java.util.*;

public class Main {

    public static void main(String args[]) {

        // 入力
        Scanner sc = new Scanner(System.in);
        long n = Long.parseLong(sc.next());
        long p = Long.parseLong(sc.next());
        sc.close();

        // 主処理
        Map<Integer, Integer> primeFactorizationMap = primeFactorizationMap(p);
        Map<Long, Long> map = new HashMap<>();
        for (int key : primeFactorizationMap.keySet()) {
            int count = primeFactorizationMap.get(key);
            if (map.containsKey((long) count)) {
                for (long i = count; 0 <= i; i--) {
                    map.put(i, (long) map.get(i) * (long) key);
                }
            } else {
                for (long i = count; 0 <= i; i--) {
                    map.put(i, (long) key);
                }
            }
        }

        Long result;
        if (map.containsKey(n)) {
            result = map.get(n);
        } else {
            List<Integer> keyList = new ArrayList<>(primeFactorizationMap.keySet());
            result = (long) keyList.get((int) Math.max(0, keyList.size() - n));
        }

        // 出力
        System.out.println(result);
    }

    public static Map<Integer, Integer> primeFactorizationMap(long num) {
        Map<Integer, Integer> map = new HashMap<>();
        map.put(1, 1);
        int max = (int) Math.sqrt(num);
        int div = 2;
        while (div <= max) {
            if (num % div == 0) {
                num /= div;
                if (map.containsKey(div)) {
                    map.put(div, map.get(div) + 1);
                } else {
                    map.put(div, 1);
                }
            } else {
                div++;
            }
        }
        if (num != 1) {
            map.put((int) num, 1);
        }
        return map;
    }
}