#include <fstream>

using namespace std;
ifstream cin("evaluare.in");
ofstream cout("evaluare.out");
const int N=100001;
char s[N];
int p;
int expresie();
int termen();
int factor();
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 semn=1,val=0;
    while(s[p]==' '){
        p++;
        semn=-semn;
    }
    if(s[p]=='('){
    p++;
    val=expresie();
    p++;
    return semn*val;
    }
    while(s[p]>='0'&& s[p]<='9'){
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}
int main()
{
    cin>>s;
    cout<<expresie();
}