#include <bits/stdc++.h>

using namespace std;

#define USE_STD_IO 0
#if USE_STD_IO
    #define fin cin
    #define fout cout
#else
    ifstream fin("evaluare.in");
    ofstream fout("evaluare.out");
#endif // USE_STD_IO

char c[100002];
int n, i;

static inline int Numar();
static inline int ProdImp();
static inline int AddScad();

static inline int Numar() {
    int nm = 0;
    if('(' == c[i]) {
        i++;
        nm = AddScad();
        i++;
    }
    else {
        while(isdigit(c[i])) nm = nm * 10 + c[i++] - '0';
    }
    return nm;
}

static inline int ProdImp() {
    int nm = Numar();
    while('*' == c[i] || '/' == c[i]) {
        char semn = c[i++];
        if('*' == semn) nm *= Numar();
        else            nm /= Numar();
    }
    return nm;
}

static inline int AddScad() {
    int nm = ProdImp();
    while('+' == c[i] || '-' == c[i]) {
        char semn = c[i++];
        if('+' == semn) nm += ProdImp();
        else            nm -= ProdImp();
    }
    return nm;
}

int main() {
    if(USE_STD_IO) ios_base::sync_with_stdio(false);
    fin.tie(NULL);
    fout.tie(NULL);

    fin >> c;
    n = strlen(c);

    i = 0;
    fout << AddScad();

    return 0;
}