#include <fstream>
#include <stack>
#include <cstring>


using namespace std;

inline int cti(const char& c)
{
    return c-'0';
}

long int pharseVal(int& i, const char* s)
{
    int t = 0;
    while('0'<= s[i] && s[i] <= '9')
    {
        t = t*10+cti(s[i]);
        i++;
    }
    i--;
    return t;
}

long int applyOp(const long int& a, const long int& b, const char& op)
{
    switch(op)
    {
    case '+':
        return a+b;
    case '-':
        return a-b;
    case '*':
        return a*b;
    case '/':
        return a/b;
    default:
        return 0;
    }
    return 0;
}

inline bool isOp(const char& c)
{
    return (c == '+' || c == '-' || c == '*' || c == '/');
}

inline int grade(const char& op)
{
    switch(op)
    {
    case '+':
        return 0;
    case '-':
        return 0;
    case '*':
        return 1;
    case '/':
        return 1;
    default:
        return 10;
    }
    return 10;
}

int eval(const char* s)
{
    stack<long int> val;
    stack<char> op;

    int i = 0;
    const long int n = strlen(s);
    while(i<n)
    {
        if('0'<= s[i] && s[i] <= '9')
            val.push(pharseVal(i,s));
        else
        if(s[i] == '(')
           op.push('(');
        else
        if(s[i] == ')')
        {
            while(op.top()!='(')
            {
                const long int a = val.top();
                val.pop();
                const long int b = val.top();
                val.pop();
                val.push(applyOp(b, a, op.top()));
                op.pop();
            }
            op.pop();
        }
        else
        {
            while(!op.empty() && isOp(op.top()) && grade(op.top()) >= grade(s[i]))
            {
                const long int a = val.top();
                val.pop();
                const long int b = val.top();
                val.pop();
                val.push(applyOp(b, a, op.top()));
                op.pop();
            }
            op.push(s[i]);
        }

        i++;
    }
    while(!op.empty())
    {
        const long int a = val.top();
        val.pop();
        const long int b = val.top();
        val.pop();
        val.push(applyOp(b, a, op.top()));
        op.pop();
    }
    return val.top();
}

char s[100001];

int main()
{
    ifstream f("evaluare.in");
    ofstream g("evaluare.out");

    f.get(s,100000);
    g << eval(s);

    return 0;
}