백준 7단계(1152)

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.util.StringTokenizer;
 
public class Main {
    
    public static void main(String[] args) throws Exception{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out));
        //스트링 토큰나이저의 이해도를 위한 문제 같은 느낌
        String str = br.readLine();
        StringTokenizer st = new StringTokenizer(str);
 
        bw.write(String.valueOf(st.countTokens()));
        bw.flush();
    }
}