#include<stdio.h>
#include<string.h>
#include<math.h>
int main()
{
    char s[35];
    scanf("%s",s);
    int n = strlen(s);
    int currentDepth = 0,maxDepth = 0;
    for (int i = 0; i < n ; i++)
    {
        if (s[i] == ')')
        {
            currentDepth++;
            if (currentDepth > maxDepth)
            maxDepth = currentDepth;
        }
        else if (s[i] == ')')
        {
            currentDepth--;
            if (currentDepth<0 )
            {
                printf("Invalid input");
                return 0;
            }
        }
        ele
        {
            printf("invalid input")
            return 0;
        }
    }
        if (currentDepth != 0)
        {
            printf("Invalid input");
            return 0;
        }
        int score = (int)pow(2,maxDepth - 1);
        printf("%d",score);
        return 0;
        }
}