#include <cstdio>
#include <cstring>
using namespace std;

const int MAX = 100001,
          HMAX = 2;
char S[MAX], *p = S,
     operand[4][4] = {"+-", "*/", "^", ""};
int termen();
int factor();

int op(int x, int y, char c) {
    switch ( c ) {
		case '+': return x+y;
		case '-': return x-y;
		case '*': return x*y;
		case '/': return x/y;
	}
	return 0;
}

int eval(int);

int elem() {
    int r = 0;
    if(*p == '(')
        ++p, r = eval(0), ++p;
    else
        while(*p >= '0' && *p <= '9')
            r = r * 10 + *p - '0', ++p;
    return r;
}

int eval(int h) {
    int r = (h == HMAX) ? elem() : eval(h+1);
    while(strchr(operand[h], *p))
        r = op(r, eval(h+1), *(++p-1));
    return r;
}

int main()
{
    freopen("evaluare.in", "r", stdin);
    freopen("evaluare.out", "w", stdout);
    fgets(S, MAX, stdin);
    printf("%i", eval(0));
    return 0;
}