#include <algorithm>
#include <cstdio>

using namespace std;

const int N=100005;

char a[N], *p=a;

int eval();

int factor()
{
    int ret=0;
    if(*p=='(')
    {
        p++;
        ret=eval();
        p++;
    }
    else
    {
        for(;*p>='0'&&*p<='9';p++) ret=10*ret+*p-'0';
    }
    return ret;
}

int termen()
{
    int ret=factor();
    while(*p=='*'||*p=='/')
    {
        if(*p=='*')
        {
            p++;
            ret*=factor();
        }
        else
        {
            p++;
            ret/=factor();
        }
    }
    return ret;
}

int eval()
{
    int ret=termen();
    while(*p=='+'||*p=='-')
    {
        if(*p=='+')
        {
            p++;
            ret+=termen();
        }
        else
        {
            p++;
            ret-=termen();
        }
    }
    return ret;
}

int main()
{
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    scanf("%s", a);
    printf("%d\n", eval());
}