#include<fstream>
#include<string>
using namespace std;
ifstream in("evaluare.in");
ofstream out("evaluare.out");
char s[100001];
int p=0;

int expresie();
int termen();
int factor();

int factor(){
    int val=0,semn=1;
    while(s[p]=='-'){
        semn=-semn;
        p++;
    }
    if(s[p]=='('){
       p++;
       val=expresie();
       p++;
       return semn*val;
    }
    while(s[p]>='0'&&s[p]<='9'){
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}
int termen(){
    int prod=factor();
    while(s[p]=='*'||s[p]=='/'){
        if(s[p]=='*'){
            p++;
            prod*=termen();
        }
        else{
            p++;
            prod/=termen();
        }
    }
    return prod;
}
int expresie(){
    int sum=termen();
    while(s[p]=='+'||s[p]=='-'){
        if(s[p]=='+'){
            p++;
            sum+=termen();
        }
        else{
            p++;
            sum-=termen();
        }
    }
    return sum;
}
int main(){
    in.getline(s,100001);
    out<<expresie();
    return 0;
}