문제

코드

1. Scanner 사용(17672KB, 208ms)

import java.util.Scanner;

public class q13909 {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        System.out.print((int)Math.sqrt(N));
    }
}

2. Buffered 사용 (14260KB, 124ms)

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class q13909 {
    public static void main(String[] args) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));

        int N = Integer.parseInt(br.readLine());
        bw.write((int)Math.sqrt(N) + "");
        bw.flush();
    }
}