#include <stdio.h>
#include <string.h>
#define maxn 100010

char buffer[maxn];
int numere[maxn/2],ind=-1;
char operatori[maxn];
int indop=-1;
char precedenta[]="(-+*/)";//6 operatori

int main(){
   FILE *fin=fopen("evaluare.in","r");
   fgets(buffer,maxn,fin);
   int n=strlen(buffer);
   if(buffer[n-1]=='\n'){
     buffer[n-1]=0;
     n--;
   }
   //printf("%s",buffer);
   int i=0;
   int nr;
   char *aux;
   while(i<n){
      //printf("i=%d\n",i);
      //daca caracterul al i-lea e cifra=>parte dintr-un operand
     if(buffer[i]<='9' && buffer[i]>='0'){     //daca e numar, citesc tot numarul
        nr=0;
        while(buffer[i]<='9' && buffer[i]>='0' && i<n){
           nr*=10;
           nr+=buffer[i]-'0';
           i++;
        }
        numere[++ind]=nr;
        //printf("am citit un numar: %d\n",nr);
     }else{
      //daca e operator
          if(buffer[i]==')'){
              while(operatori[indop]!='('){
                 switch(operatori[indop]){
                    case '+':numere[ind-1]+=numere[ind];ind--;break;
                    case '-':numere[ind-1]-=numere[ind];ind--;break;
                    case '*':numere[ind-1]*=numere[ind];ind--;break;
                    case '/':numere[ind-1]/=numere[ind];ind--;break;
                 }
                indop--;
              }              
             //acum e '(', trebuie stearsa si ea
             indop--;
          }else{
              aux=strchr(precedenta,buffer[i]);
              if(buffer[i]!='('){
                while(aux<strchr(precedenta,operatori[indop]) && indop>=0){//cat timp ce adaug are precedenta mai mica ca ce e inainte
                   switch(operatori[indop]){
                      case '+':numere[ind-1]+=numere[ind];ind--;break;
                      case '-':numere[ind-1]-=numere[ind];ind--;break;
                      case '*':numere[ind-1]*=numere[ind];ind--;break;
                      case '/':numere[ind-1]/=numere[ind];ind--;break;
                   }
                  indop--;
                }    
              }          
              operatori[++indop]=buffer[i];
          }//else: caracterul curent e operator, dar nu e ')'
      i++;
    }//else e caracter, nu cifra
 }//while dupa buffer

 //acum calculez
    while(indop>=0){
         switch(operatori[indop]){
           case '+':numere[ind-1]+=numere[ind];ind--;break;
           case '-':numere[ind-1]-=numere[ind];ind--;break;
           case '*':numere[ind-1]*=numere[ind];ind--;break;
           case '/':numere[ind-1]/=numere[ind];ind--;break;
         }
         indop--;
  }            
  FILE *fout=fopen("evaluare.out","w");  
  fprintf(fout,"%d\n",numere[0]); 
return 0;
}