#include <cstdio>
#include <cctype>

using namespace std;

const int N=100001;
char s[N];
int p=0;
int expresie();
int termen ();
int factor();
int expresie1();
int expresie(){
    int sum=termen();
    while(s[p]=='+' || s[p]=='-'){
        if(s[p]=='+'){
            p++;
            sum+=termen();
        }else{
            p++;
            sum-=termen();
            }
        }
        return sum;
}
int termen(){
    int prod=factor();
    while(s[p]=='*' || s[p]=='/'){
        if(s[p]=='*'){
            p++;
            prod*=factor();
        }else{
            p++;
            prod/=factor();
            }
    }
    return prod;
}
int factor(){
    int val=0, semn=1;
    while(s[p]=='-'){
        p++;
        semn=-semn;
    }
    if(s[p]=='('){
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(isdigit(s[p])){
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}

int main()
{
   FILE *fin, *fout;
   fin=fopen("evaluare.in", "r");
   fout=fopen("evaluare.out", "w");
   int rez;
   fgets(s, N, fin);
   rez=expresie();
   fprintf(fout, "%d", rez);
   return 0;
}