#include <stdio.h>
#include <string.h>
#define NMAX 100023
FILE *fin, *fout;
char s[NMAX], *p;
int eval();
int termen();
int factor();
int main()
{
    fin = fopen("evaluare.in", "r");
    fout = fopen("evaluare.out", "w");
    fgets(s, NMAX, fin);
    p = s;
    fprintf(fout, "%d", eval());
    fclose(fin);
    fclose(fout);
    return 0;
}
int eval()
{
    int r = termen();
    while(*p == '+' || *p == '-')
    {
        if(*p == '+') {p++;r += termen();}
        else {p++;r-=termen();}
    }
    return r;
}
int termen()
{
    int r = factor();
    while(*p == '*' || *p == '/')
    {
        if(*p == '*') {p++;r*=factor();}
        else {p++;r/=factor();}
    }
    return r;
}
int factor()
{
    int r = 0;
    if(*p == '(')
    {
        p++;
        r = eval();
        p++;
    }
    else
    {
        while(*p <= '9' && *p >= '0')
        {
            r = r*10 + *p - '0';
            p++;
        }
    }
    return r;
}