#include<cstdio>
#include<string>

using namespace std;

#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

const int NMAX = 100000 + 5;

char expr[NMAX], *p;
int eval(), term(), fact(), numb();

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

    while(*p == '+' || *p == '-') {
        if(*p == '+') {
            p++;
            ans += term();
            continue;
        }

        if(*p == '-') {
            p++;
            ans -= term();
            continue;
        }
    }

    return ans;
}

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

    while(*p == '*' || *p == '/') {
        if(*p == '*') {
            p++;
            ans *= fact();
            continue;
        }

        if(*p == '/') {
            p++;
            ans /= fact();
            continue;
        }
    }

    return ans;
}

int fact() {
    int ans;

    if(*p == '(') {
        p++;
        ans = eval();
        p++;
    } else
        ans = numb();

    return ans;
}

int numb() {
    int ans = 0;

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

    return ans;
}

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

    scanf("%s", expr);

    p = expr;

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

    return 0;
}