#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
const int N=100001;
int p;
char s[N];
int expresie();
int termen();
int factor();
int main()
{
    freopen("evaluare.in","r",stdin);
    gets(s);
    fprintf(fopen("evaluare.out","w"),"%d",expresie());
    return 0;
}
int termen(){
    int sum=factor();
    while(s[p]=='/' || s[p]=='*') {
        if(s[p]=='*')
            p++,sum*=factor();
        else
            p++,sum/=factor();
    }
    return sum;
}
int expresie()
{
    int sum=termen();
    while(s[p]=='+' || s[p]=='-') {
        if(s[p]=='+')
            p++,sum+=termen();
        else
            p++,sum-=termen();
    }
    return sum;
}
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;
}