#include <iostream>
#include <fstream>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[10005];
char *p;
int eval(void);
int termen(void);
int factor(void);
int eval()
{
    int r=termen();
    while(*p=='+' or *p=='-')
    if(*p=='+') {p++; r+=termen();}
    else {p++; r-=termen();}
    return r;
}
int termen()
{
    int r=factor();
    while(*p=='*' or *p=='/')
    if(*p=='*') {p++; r*=factor();}
    else {p++; r/=factor();}
    return r;
}
int factor()
{
    int r;
    if(*p=='(') {p++; r=eval(); p++;}
    else{r=0;
        while(isdigit(*p)){
        r=r*10+*p-'0';
        p++;}
        }
    return r;
}
int main()
{f>>s;
p=s;
g<<eval();

    return 0;
}