백준(1316) JAVA - 그룹 단어 체커

import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		
		int N = sc.nextInt();
		
		int count = 0;
		
		char[] chr = new char[(int)'z' + 1];
		
		
		
		for(int i = 0 ; i < N ; i++) {
			for(int j = 0 ; j < chr.length ; j++) {  //초기화
				chr[j] = 'o';
			}
			boolean flag = true;
			String str = sc.next();
			
			for(int j = 0 ; j < str.length() ; j++) {
				if(chr[(int)str.charAt(j)] == 'o') { 				
					for(int k = j+1 ; k < str.length() ; k++) {		
						if(str.charAt(j) == str.charAt(k)) {
							if(str.charAt(k-1) != str.charAt(k)) {
								chr[(int)str.charAt(j)] = 'x';
								break;	
							}
						}
					}
				}
			}
			
			for(int j = 0 ; j < chr.length ; j++) {
				if(chr[j] == 'x') {
					flag = false;
				}
			}
			if(flag) {
				count++;
			}
		}
		
		System.out.println(count);
		
	}
}