#include <fstream>
#include <string.h>
using namespace std;

ifstream f("evaluare.in");
ofstream g("evaluare.out");

char c,semn[100000],st[100000];
int i,n,k,nr,gasitnr,fp[100000];
long long steval[1000];

int main(){
	while(f >> c){
		if(c >= '0' && c <= '9'){
			gasitnr = 1;
			nr *= 10;
			nr += c-'0';
		}else{
			if(gasitnr){
				n++;
				fp[n] = nr;
				nr = 0;
				gasitnr = 0;
			}
			if(c == '(' || c == '+' || c == '-' || c == '*' || c == '/'){
				k++;
				st[k] = c;
				if(st[k] == '+' || st[k] == '-'){
					while(st[k-1] == '+' || st[k-1] == '-' || st[k-1] == '*' || st[k-1] == '/'){
						n++;
						semn[n] = st[k-1];
						st[k-1] = st[k];
						k--;
					}
				}else{
					if(st[k] == '*' || st[k] == '/'){
						while(st[k-1] == '*' || st[k-1] == '/'){
							n++;
							semn[n] = st[k-1];
							st[k-1] = st[k];
							k--;
; 						}
					}
				}
			}else{
				if(c == ')'){
					while(st[k] != '('){
						n++;
						semn[n] = st[k];
						k--;
					}
					k--;
				}
			}
		}
	}
	if(gasitnr){
		n++;
		fp[n] = nr;
		nr = 0;
		gasitnr = 0;
	}
	while(k){
		n++;
		semn[n] = st[k];
		k--;
	}
	k = 0;
	for(int i = 1; i <= n; i++){
		if(semn[i] != '+' && semn[i] != '-' && semn[i] != '*' && semn[i] != '/'){
			k++;
			steval[k] = fp[i];
		}else{
			switch(semn[i]){
				case '+': steval[k-1] = steval[k-1]+steval[k]; break;
				case '-': steval[k-1] = steval[k-1]-steval[k]; break;
				case '*': steval[k-1] = steval[k-1]*steval[k]; break;
				case '/': steval[k-1] = steval[k-1]/steval[k]; break;
				default:
					break;
			}
			k--;
		}
	}
	g << steval[1];
	return 0;
}