#include <stdio.h>

FILE *in, *out;
char c;

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

int expresie()
{
    int sum=termen();
    while(c=='+'|| c=='-')
        if(c=='+')
        {
            c=fgetc(in);
            sum=sum+termen();
        }
        else
        {
            c=fgetc(in);
            sum=sum-termen();
        }
    return sum;
}

int termen()
{
    int prod=factor();
    while(c=='*'|| c=='/')
        if(c=='*')
        {
            c=fgetc(in);
            prod*=factor();
        }
        else
        {
            c=fgetc(in);
            prod/=factor();
        }
    return prod;
}

int factor()
{
    int val=0, semn=1;
    while(c=='-')
    {
        semn=-semn;
        c=fgetc(in);
    }
    if(c=='(')
    {
        c=fgetc(in);
        val=expresie();
        c=fgetc(in);
        return semn * val;
    }
    while(c>='0' && c<='9')
    {
        val=val*10+(c-'0');
        c=fgetc(in);
    }
    return semn* val;
}

int main()
{
    in=fopen("evaluare.in", "r");
    out=fopen("evaluare.out", "w");
    c=fgetc(in);
    fprintf(out, "%d\n", expresie());
    fclose(in);
    fclose(out);
    return 0;

}