#include <iostream>
#define FIN "evaluare.in"
#define FOUT "evaluare.out"
using namespace std;
int lop=0;
int drez=0,rez[10000];
char op[100000];




void add_op(int op){
        if (op=='+'){
                --drez;
                rez[drez]+=rez[drez+1];
        } else if (op=='-'){
                --drez;
                rez[drez]-=rez[drez+1];
                } else if (op=='*'){
                --drez;
                rez[drez]*=rez[drez+1];
                } else {
                        --drez;
                        rez[drez]/=rez[drez+1];
                }
}

void add_val(int vl){
        rez[++drez]=vl;
}


void erase(void){
        while (lop>=1 && op[lop]!='('){
                add_op(op[lop]);
                lop--;}
}

void iofile(void){
        lop=0;
        freopen(FIN,"rt",stdin);
        freopen(FOUT,"wt",stdout);
        int c=11,x=0;
        for (c=getchar();c!='\n';c=getchar()){
                if (c>='0' && c<='9'){x=x*10+c-'0';} else{
                        if (x){add_val(x);}
                        x=0;
                        if (c=='('){op[++lop]=c;} else
                        if (c=='*'){op[++lop]=c;} else
                        if (c=='/'){op[++lop]=c;} else
                        if (c=='-' || c=='+'){
                                if (lop>0 && (op[lop]=='*' || op[lop]=='/')){
                                        erase();}
                                op[++lop]=c;
                        } else if (c==')'){
                                erase();
                                lop--;}
                 }
        }
        if (x){add_val(x);}
        if (lop){erase();}
        printf("%d\n",rez[1]);
        fclose(stdin);
        fclose(stdout);
}

int main(void){
        iofile();
        return 0;
}