https://www.youtube.com/@JomaClass
https://www.acmicpc.net/problem/1152
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
String[] words = str.split(" ");
int cnt = 0;
for(String word : words) {
if(word.equals(""){
continue;
}
cnt++;
System.out.println(cnt);
https://www.acmicpc.net/problem/1181
set을 쓰면 중복값이 알아서 삭제된다
https://www.acmicpc.net/problem/1157
https://school.programmers.co.kr/learn/courses/30/lessons/92334