#include <fstream>
using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
const int N=100000;
int n;
char s[N+5];
int p=0;
int termen();
int factor();
int expresie();
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 sol=factor();
    while(s[p]=='*' || s[p]=='/'){
        if(s[p]=='*'){
            p++;
            sol*=factor();
        }
        else{
            p++;
            sol/=factor();
        }
    }
    return sol;
}
int factor(){
    int semn=1,val=0;
    while(s[p]=='-'){
        semn*=-1;
        p++;
    }
    if(s[p]=='('){
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while('0'<=s[p] && s[p]<='9'){
        val=10*val+s[p]-'0';
        p++;
    }
    return semn*val;
}
int main(){
    cin.getline(s,N+5);
    cout<<expresie();
    return 0;
}
/**


**/