#include<algorithm>
#include<bitset>
#include<cmath>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<ctime>
#include<deque>
#include<fstream>
#include<iomanip>
#include<iostream>
#include<map>
#include<queue>
#include<set>
#include<stack>
#include<unordered_map>
#include<unordered_set>
#include<utility>
#include<vector>

using namespace std;

#define dbg(x) (cout<<#x<<" = "<<(x)<<'\n')
#ifdef HOME
const string inputFile = "input.txt";
const string outputFile = "output.txt";
#else
const string problemName = "evaluare";
const string inputFile = problemName + ".in";
const string outputFile = problemName + ".out";
#endif // HOME

typedef long long int lld;
typedef pair<int, int> PII;
typedef pair<int, lld> PIL;
typedef pair<lld, int> PLI;
typedef pair<lld, lld> PLL;

const int INF = (1LL << 31) - 1;
const lld LINF = (1LL << 62) - 1;
const int dx[] = {1, 0, -1, 0, 1, -1, 1, -1};
const int dy[] = {0, 1, 0, -1, 1, -1, -1, 1};
const int MOD = (int)(1e9) + 7;

const int NMAX = 100000 + 5;
const int MMAX = 100000 + 5;
const int KMAX = 100000 + 5;
const int PMAX = 100000 + 5;
const int LMAX = 100000 + 5;
const int VMAX = 100000 + 5;

char sir[NMAX], *p;

int eval(), term(), fact(), numb();

int eval() {
    int a = term();

    while(*p == '+' || *p == '-')
        if(*p == '+') {
            p++;
            a += term();
        } else if(*p == '-') {
            p++;
            a -= term();
        }

    return a;
}

int term() {
    int a = fact();

    while(*p == '*' || *p == '/')
        if(*p == '*') {
            p++;
            a *= fact();
        } else if(*p == '/') {
            p++;
            a /= fact();
        }

    return a;
}

int fact() {
    if(*p == '(') {
        p++;
        int a = eval();
        p++;
        return a;
    } else
        return numb();
}

int numb() {
    int a = 0, semn = 1;

    if(*p == '-') {
        semn = -1;
        p++;
    }

    while('0' <= *p && *p <= '9') {
        a = a * 10 + *p - '0';
        p++;
    }

    return a * semn;
}

int main() {
#ifndef ONLINE_JUDGE
    freopen(inputFile.c_str(), "r", stdin);
    freopen(outputFile.c_str(), "w", stdout);
#endif

    scanf("%s", sir);

    p = sir;

    printf("%d\n", eval());

    return 0;
}