#include <fstream>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char S[100010],*p=S;
int expr();
int factor()
{   int r;
    if(*p=='(') {++p;r=expr();++p;}
    else
    {   r=0;
        while('0'<=*p and *p<='9')
        {   r=r*10+*p-'0';p++;}
    }
    return r;
}
int termen()
{   int r=factor();
    while(*p=='*' or *p=='/')
        switch(*p)
        {   case '*':++p; r*=factor(); break;
            case '/':++p; r/=factor(); break;
        }
    return r;
}
int expr()
{   int r=termen();
    while(*p=='+' or *p=='-')
        switch(*p)
        {   case '+':++p; r+=termen();break;
            case '-':++p; r-=termen();break;
        }
    return r;
}
int main()
{   f>>S;
    g<<expr();
    return 0;
    g.close();
    return 0;
}