Codeforces : 443A - Anton and Letters

문제

• 링크

코드

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;

public class A_Anton_and_Letters {
	
	static BufferedReader br;
	
	
	public static void main(String[] args) throws IOException{
		br = new BufferedReader(new InputStreamReader(System.in));
		String test = br.readLine();
		Set<String> sets = new HashSet<>();
		String test1 = test.substring(1, test.length()-1);
		StringTokenizer stk = new StringTokenizer(test1);
		
		while(stk.hasMoreTokens()) {
			String target = stk.nextToken();
			String inner = target;
			if(inner.charAt(inner.length()-1)==',') {
				inner = target.substring(0,target.length()-1);
			}
//			System.out.println(inner);
			sets.add(inner);
		}
		System.out.println(sets.size());
				
	}
}

회고

• 기본적인 입출력 문제

• set을 통해서 유일성을 확인