// you can also use imports, for example:
// import java.util.*;

// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");

class Solution {
    public int solution(int N) {
        // write your code in Java SE 8
    }
}

// you can also use imports, for example:
// import java.util.*;

// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");

class Solution {
    public int solution(int N) {
		int side = (int) Math.sqrt(N);
		while (N % side != 0) {
			side--;
		}
		return 2 * (side + (N/side));
    }
}

// you can also use imports, for example:
// import java.util.*;

// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");

class Solution {
    public int solution(int N) {
		int side = (int) Math.sqrt(N);
		while (N % side != 0) {
			side--;
		}
		return 2 * (side + (N/side));
    }
}

// you can also use imports, for example:
// import java.util.*;

// you can write to stdout for debugging purposes, e.g.
// System.out.println("this is a debug message");

class Solution {
    public int solution(int N) {
		int side = (int) Math.sqrt(N);
		while (N % side != 0) {
			side--;
		}
		return 2 * (side + (N/side));
    }
}