#include <iostream>
#include<fstream>

using namespace std;

char s[100001];
int p;

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

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 sum=factor();
    while(s[p]=='*' || s[p] == '/' )
        if ( s[p] == '*' )
        {
            p++;
            sum*=factor();
        }
        else{
            p++;
            sum/=factor();
        }
    return sum;
}

int factor(){
    int semn = 1, val = 0;
    while( s[p] == '-' ){
        p++;
        semn = -semn;
    }
    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 main()
{
    ifstream in("evaluare.in");
    ofstream out("evaluare.out");
    in.getline(s,100001);
    out << expresie();
    return 0;
}