#include <bits/stdc++.h>

using namespace std;
ifstream fin("evaluare.in");
ofstream fout("evaluare.out");

#define LMAX 2 //nivel de prioritate
char op[4][4]={"+-","*/","^",""};//operatori pe niveluri de prioritate
#define NMAX 100010
char S[NMAX],*p=S;

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

int expr(int lev) //expr incepe de pe p si are nivelul lev
{
    int x,y;

    if(lev==LMAX)
        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(lev+1);strchr(op[lev],*p);x=y)
            y=eval(x,expr(lev+1),*p++);

    return x;
}
int main()
{
    fgets(S,NMAX,fopen("evaluare.in","r"));
	fout<<expr(0);
    return 0;
}