#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#define NMAX 100010

using namespace std;

int p[NMAX];
char e[NMAX];

int calcExpr(char op, int x, int y){
    switch (op){
        case '+':
            return x+y;
            break;
        case '-':
            return x-y;
            break;
        case '*':
            return x*y;
            break;
        case '/':
            return x/y;
            break;
    }
    return 0;
}

int calc(int st, int dr){
    int i,pmin=p[st],pozmin=st,aux=e[dr+1];
    e[dr+1]=0;
    if (strchr(e+st,'-')||strchr(e+st,'+')||strchr(e+st,'*')||strchr(e+st,'/')){
        e[dr+1]=aux;
        for (i=st+1;i<=dr;i++){
            if (pmin>p[i]){
                pmin=p[i]; pozmin=i;
            }
        }
        return calcExpr(e[pozmin],calc(st,pozmin-1),calc(pozmin+1,dr));
    }else{
        i = atoi(e+st);
        e[dr+1]=aux;
        return i;
    }
}

int main(){
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    int n,i,j,pc=0,k=0,poz,r;
    char s[NMAX];

    scanf("%s", s);
    
    n=strlen(s)-1;
    
    for (i=0;i<=n;i++){
        switch (s[i]){
            case '+':
                e[k]=s[i];
                p[k]=pc+1;
                k++;
                break;
            case '-': 
                e[k]=s[i];
                p[k]=pc+1;
                k++;
                break;
            case '*':
                e[k]=s[i];
                p[k]=pc+2;
                k++;
                break;
            case '/': 
                e[k]=s[i];
                p[k]=pc+2;
                k++;
                break;
            case '(':
                pc+=10;
                break;
            case ')':
                pc-=10;
                break;
            case '=':
                break;
            default:
                poz=strspn(s+i,"0123456789");
                strncpy(e+k,s+i,poz);
                for (j=k;j<k+poz;j++) p[j]=10000;
                i+=poz-1; k+=poz;
                break;
        }
    }
    e[k]=0;
-   k--;

    r=calc(0,k);
    
    printf("%d", r);
    
    return 0;
}