#include <bits/stdc++.h>

#define DIM 100000

using namespace std;

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

//ifstream f("filesmodel.in");
//ofstream g("filesmodel.out");

int n;
char s[DIM+1];

int i = 0;

int A();
int B();
int C();

int A(){

    int r = B();

    char op;
    int x;
    while(s[i] == '+' || s[i] == '-'){
        op = s[i];
        i++;

        x = B();

        if(op == '+'){
            r+=x;
        }else{
            r-=x;
        }
    }

    return r;
}

int B(){

    int r = C();

    char op;
    int x;
    while(s[i] == '*' || s[i] == '/'){
        op = s[i];
        i++;

        x = C();

        if(op == '*'){
            r*=x;
        }else{
            r/=x;
        }
    }

    return r;
}

int C(){

    int r;

    if(s[i] == '('){
        i++;

        r = A();

        i++;

        return r;
    }

    r = 0;
    while('0'<=s[i] && s[i]<='9'){
        r = r*10 + (s[i]-'0');
        i++;
    }

    return r;
}

signed main(){

    f>>s;
    n = strlen(s);

    i = 0;
    g<<A();

    return 0;
}