package Eric;

import java.util.Scanner;

public class 函数 {

    private static char[] c;

    public static void hanshu(int z,String[] str) {
        int d = 0;
        for(int i = 0; i < str.length; i++) {
            int a1;
            a1 = str[i].indexOf('+');   
        if (a1 != -1) {
            String marksStr1 = str[i].substring(a1-1);
            String marksStr2 = str[i].substring(a1+1);
            int a;
            a = Integer.parseInt(marksStr1);
            int b;
            b = Integer.parseInt(marksStr2);
            int c = a + b;  
            int e = c;
            d = e + c;
            }
        }
        System.out.println(d);
        for(int i = 0; i < str.length; i++) {
            int a2;
            a2 = str[i].indexOf('*');   
        if (a2 != -1) {
            String marksStr1 = str[i].substring(a2-1);
            String marksStr2 = str[i].substring(a2+1);
            int a;
            a = Integer.parseInt(marksStr1);
            int b;
            b = Integer.parseInt(marksStr2);
            int c = a * b;  
            int e = c;
            d = e * c;
          }
        }
        System.out.println(d);
    }
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner in = new Scanner(System.in);
        int z = in.nextInt();
        String[] str = new String[z+z-1];
        for(int i = 0; i < str.length; i++) {
         str[i] = in.next();
        }
        hanshu(z, str);
    }

}