#include <iostream>
#include <fstream>
#include <cstring>
using namespace std;
char op[3][3] {"+-","*/",""};
char s[100005];
char *p;
int opf(int x1,int x2,char o)
{
    switch (o)
    {
        case '+':return x1+x2;
        case '-':return x1-x2;
        case '/':return x1/x2;
        case '*':return x1*x2;
    }
}
int eval(int lvl)
{
    int x,y;
    char ch;
    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)
        {
            ch=*p;
            p++;
            y=opf(x,eval(lvl+1),ch);
        }
    return x;
}
int main(void)
{
    FILE * f;
    f=fopen("evaluare.in","r");
    fgets(s,100005,f);
    p=s;
    ofstream g("evaluare.out");
    g<<eval(0);
    return 0;
}