#include <cstdio>

using namespace std;

FILE *in,*out;


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

const int N = 100002;
char s[N];
int p;

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] == '-' ){
        semn=-semn;
        p++;
    }
    if(s[p] == '('){
        p++;
        val=expresie();
        p++;
        return val;
    }
    while(s[p] >= '0' && s[p] <= '9')
        val = val*10+s[p++]-'0';
    return val;
}

int main()
{
    in = fopen("evaluare.in","r");
    out = fopen("evaluare.out","w");
    int rez;
    fgets(s,100000,in);
    rez=expresie();
    fprintf(out,"%d\n",rez);
    return 0;
}