#include<bits/stdc++.h>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100002];
char operatii[3][3]={"+-","*/","^"};
char cifre[11]={"0123456789"};
char *p=s;
char *z=s;
const int nivelMax=2;
int eval(int x);
int oper(int x,int y,char op){
    switch(op){
    case '+':
        return x+y;
    case '-':
        return x-y;
    case '*':
        return x*y;
    case '/':
        return x/y;
    }
    return 0;
}
int el(){
    int rez=0;
    if(*p=='('){
        ++p;
        rez=eval(0);
        ++p;
    }
    else{
        while(strchr(cifre,*p)&&!((p!=NULL)&&(p[0]=='\0')))
            rez=rez*10+*(++p-1)-'0';
        cout<<rez<<'\n';
    }
    return rez;
}
int eval(int niv){
    int rez;
    if(niv==nivelMax)
        rez=el();
    else
        rez=eval(niv+1);
    while(strchr(operatii[niv],*p)&&!((p!=NULL)&&(p[0]=='\0')))
        rez=oper(rez,eval(niv+1),*(++p-1));
    return rez;
}
int main()
{
    f>>s;
    g<<eval(0)<<'\n';
    f.close();
    g.close();
    return 0;
}