add: swea/P7728.java

swea/P7728.java

@@ -0,0 +1,19 @@
+import java.util.Scanner;
+import java.util.HashSet;
+
+public class P7728{
+	public static void main(String[] args){
+		Scanner scn=new Scanner(System.in);
+		int t=scn.nextInt();
+
+		for(int tc=1;tc<t+1;tc++){
+			HashSet<Character> cs=new HashSet<>();
+			String s=scn.next();
+			for(char c:s.toCharArray()){
+				cs.add(c);
+			}
+			System.out.println("#"+tc+" "+cs.size());
+		}
+		return;
+	}
+}