#include <iostream>
#include <fstream>
#include <vector>
#include <string>
#include <algorithm>
using namespace std;
ifstream f("evaluare.in");ofstream g("evaluare.out"); char ee[100013], *it; int sol(); int num(){    int nr = 0;    if(*it=='('){it++; nr=sol(); it++;} else {        while(*it>='0'&&*it<='9'){            nr=nr*10+*it-'0';            it++;        }    }    return nr;} int fct(){    int pro = num();    while(*it=='*'||*it=='/'){        if(*it=='*'){it++; pro*=num();}        if(*it=='/'){it++; pro/=num();}    }    return pro;} int sol(){    int sum = fct();    while(*it=='+'||*it=='-'){        if(*it=='+'){it++; sum+=fct();}        if(*it=='-'){it++; sum-=fct();}    }    return sum;} int main(){    f >> ee;    it=ee;    g << sol();    return 0;}