#include <cstdio>
#include <cctype>

char s[100001];
int p;

int expresie();
int termen();
int factor();

int main()
{
    freopen("evaluare.in","r",stdin);
    freopen("evaluare.out","w",stdout);
    scanf("%s", s);
    printf("%d", expresie());
    return 0;
}

int expresie() {
    int sum=termen();
    while(s[p]=='+' || s[p]=='-')
        if (s[p]=='+') {
            p++;
            sum+=termen();
        }
        else {
            p++;
            sum-=termen();
        }
    return sum;
}

int termen() {
    int prod=factor();
    while (s[p]=='*' || s[p]=='/')
        if (s[p]=='*') {
            p++;
            prod*=factor();
        }
        else {
            p++;
            prod/=factor();
        }
    return prod;
}

int factor() {
    int val=0,semn=1;
    while (s[p]=='-') {
        p++;
        semn=-semn;
    }
    if (s[p]=='(') {
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while (isdigit(s[p])) {
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}