#include <bits/stdc++.h>

using namespace std;

char s[100005], pr[4][4]={"+-", "*/", "^", ""}, *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 lvl)
{
    int x, y;
    if(lvl==2)
    {
        if(*p=='(')
        {
            ++p;
            x=expr(0);
            ++p;
        }
        else for(x=0; *p>='0' && *p<='9'; p++)
            x=x*10+*p-'0';
    }
    else
        for(x=expr(lvl+1); strchr(pr[lvl], *p); x=y)
            y = eval(x, expr(lvl+1), *p++);
    return x;
}

int main()
{
    fgets(s, 100005, fopen("evaluare.in", "r"));
	fprintf(fopen("evaluare.out", "w"), "%d\n", expr(0));
    return 0;
}