#include <fstream>
#include <cstring>
using namespace std;

char S[100010],*p=S;
int eval2();
int calcul();

int eval1() {
	int r = eval2();
 	while (*p=='+'||*p=='-')
        {
		if (*p=='+')
		{
			p++;
			r+=eval2();
		}
        else if (*p=='-')
        {
            p++;
            r-=eval2();
        }
	}
	return r;
}

int eval2()
{
	int r = calcul();
	while(*p=='*'||*p=='/')
        {
		if(*p=='*')
            {
                p++;
				r*=calcul();
            }
        else if (*p=='/')
			{
				p++;
				r/=calcul();
			}
		}
	return r;
}

int calcul() {
    int r=0;
    if (*p=='(')
    {
        p++;
		r=eval1();
		p++;
    }
    else
    {
        while (*p>='0'&&*p<='9')
        {
            r=r*10+*p-'0';
			p++;
		}
    }
    return r;
}

int main()
{
    ifstream f("evaluare.in");
    ofstream fout("evaluare.out");
    f.getline(S,100010);
    fout<<eval1();
    return 0;
}