# include <fstream>
# include <cstring>
# define DIM 100010
using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");
char t[DIM];
int n,i;
int sum();
int prod();
int termen();
int main () {
    fin>>t+1;
    n=strlen(t+1);
    i=1;
    fout<<sum()<<"\n";
    return 0;
}
int sum(){
    int p=prod();
    while(t[i]=='+'||t[i]=='-'){
        if(t[i]=='+'){
            i++;
            p+=prod();
        }
        else{
            i++;
            p-=prod();
        }
    }
    return p;
}
int prod(){
    int t1=termen();
    while(t[i]=='*'||t[i]=='/'){
        if(t[i]=='*'){
            i++;
            t1*=termen();
        }
        else{
            i++;
            t1/=termen();
        }
    }
    return t1;
}
int termen(){
    int s=0;
    if(t[i]>='0'&&t[i]<='9'){
        while(t[i]>='0'&&t[i]<='9'){
            s*=10;
            s+=t[i]-'0';
            i++;
        }
        return s;
    }
    i++;
    s=sum();
    i++;
    return s;
}