#include <cstdio>

const long MAX = 100010;
char S[MAX], *p=S;

long termen();
long factor();
long eval(){
long r=termen();
while (*p=='+' || *p=='-'){
switch (*p){
    case '+':
        ++p;
        r+=termen();
        break;
    case '-':
        ++p;
        r-=termen();
        break;
    }}
return r;
}
long termen(){
    long r=factor();
    while (*p=='*' || *p=='/'){
switch (*p){
    case '*':
        ++p;
    r=r*factor();
    break;
    case '/':++p;
    r=r/factor();
    break;}
    }
return r;
}
long factor(){
    long r=0;
    if (*p=='('){
            ++p;r=eval();++p;
        }
        else{
        while (*p>='0' && *p<='9'){
            r=r*10+*p-'0';++p;
        }}
 return r;
}


int main() {
   fgets(S,MAX, fopen("evaluare.in","r"));
   fprintf( fopen("evaluare.out","w"),"%ld\n",eval());
    return 0;
}