#include <cstdio>

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

long Termen();
long Factor();
long Eval();

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 *= Factor();
				break;
			case '/':
				++p;
				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;
}