#include <cstring>
#include <cstdio>

#define LMAX 2
#define DIM 100010
char op[4][4]={"+-","*/","^",""};

char s[DIM], *p=s;

int eval(int a, int b, char c)
{   switch (c) {
            case '+': return a+b;
            case '-': return a-b;
            case '*': return a*b;
            case '/': return a/b; }
}

int expr(int lev) {
    int x,y;

    if (lev==LMAX)
        if (*p=='(' )
            ++p, x=expr(0), ++p;
        else
            for (x=0; (*p<='9') && (*p>='0'); p++)
                x=x*10+*p-'0';
    else
        for (x=expr(lev+1); strchr(op[lev],*p ); x=y )
            y=eval(x, expr(lev+1), *p++);
    return x;
}

int main() {
    fgets(s, DIM, fopen("evaluare.in","r"));
    fprintf(fopen("evaluare.out","w"), "%d\n", expr(0) );
    return 0; }