#include <stdio.h>
#include <ctype.h>
char s[100010],*p=s;
long eval();
long factor();
long termen();
long eval(){
    long r;
    r=termen();
    while(*p=='+'||*p=='-'){
        switch(*p){
            case '+':
                ++p;
                r+=termen();
                break;
            case '-':
                ++p;
                r-=termen();
                break;
        }
    }
    return r;
}
long termen(){
    long r=factor();
    while(*p=='*'||*p=='/'){
        switch(*p){
            case '*':
              ++p;
              r*=factor();
              break;
            case '/':
              ++p;
              r/=factor();
              break;
        }
    }
    return r;
}
long factor(){
    long r=0;
    if(*p=='('){
       p++;
       r=eval();
       p++;
    }
    else{
        while(*p>='0'&&*p<='9'){
           r=r*10+*p-'0';
           p++;
        }
    }
    return r;
}


int main(){
freopen("evaluare.in","r",stdin);
freopen("evaluare.out","w",stdout);
gets(s);
printf("%ld",eval());
fclose(stdin);
fclose(stdout);

return 0;
}