#include <stdio.h>
#define N 100001
FILE *fin , *fout;
char s[N];
int p=0;
int expresie();
int termen();
int factor();
int expresie()
{
    int sum=termen();
    while(s[p]=='+' || s[p]=='-')
    {
        if(s[p]=='+')
        {
            p++;
            sum+=termen();
        }
        else
        {
            p++;
            sum-=termen();
        }
    }
    return sum;
}
int termen()
{
    int prod=factor();
    while(s[p]=='*'  ||  s[p]=='/')
    {
        if(s[p]=='*')
        {
            p++;
            prod*=factor();
        }
        if(s[p]=='/')
        {
            p++;
            prod/=factor();
        }
    }
    return prod;
}
int factor()
{
    int semn=1 ,val=0;
    while(s[p]=='-')
    {
        p++;
        semn=-semn;
    }
    if(s[p]=='(')
    {
        p++;
        val=expresie();
        p++;
    }
    while(s[p]>='0' && s[p]<='9')
    {
        val=val*10+s[p]-'0';
        p++;
    }
    return semn*val;
}
int main()
{
    fin = fopen("evaluare.in" , "r");
    fout = fopen("evaluare.out" , "w");
    fgets(s, N, fin);
    fprintf(fout , "%d" , expresie());
    return 0;
}