#include <fstream>
#include <cstring>
#define LMAX 2
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char op[4][4] = { "+-", "*/", "^", "" };
char c[100011],*p=c;
int oper(int x,int y,char o)
{
    switch(o)
    {
        case '+':return x+y;
        case '-':return x-y;
        case '*':return x*y;
        case '/':return x/y;
    }
}
int eval(int lvl)
{
    int x,y;
    if(lvl==2)
    {
        if(*p=='(')
        {
            ++p;
            x=eval(0);
            ++p;
        }
        else
        for(x=0;*p>='0' && *p<='9';++p)
            x=x*10+*p-'0';
    }
    else
    for(x=eval(lvl+1);strchr(op[lvl],*p);x=y)
        y=oper(x,eval(lvl+1),*p++);
    return x;
}
int main()
{
    fgets(c,100011,fopen( "evaluare.in","r" ));
	fprintf(fopen("evaluare.out","w"),"%d\n",eval(0));
    return 0;
}