UVA - 621 - Secret Research

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

    public static void main(String[] args) throws IOException {
        InputStreamReader isr = new InputStreamReader(System.in);
        BufferedReader br = new BufferedReader(isr);
        StringBuffer sb = new StringBuffer("");
        String m="";
        int n=Integer.parseInt(br.readLine());
        for(int i=0;i<n;i++){
            m=br.readLine();
            int last=m.length()-1;
            if("1".equals(m)||"4".equals(m)||"78".equals(m))
                sb.append("+").append("\n");
            else if(m.charAt(last-1)=='3'&&m.charAt(last)=='5')
                sb.append("-").append("\n");
            else if(m.charAt(0)=='9'&&m.charAt(last)=='4')
                sb.append("*").append("\n");
            else if(m.charAt(0)=='1'&&m.charAt(1)=='9'&&m.charAt(2)=='0')
                sb.append("?").append("\n");
        }
        System.out.print(sb);
    }

}