#include<cstdio>
#include<cstring>
#define LMAX 2
#define NX 100010
using namespace std;
char P[4][4]={"+-","*/","^",""};
char S[NX],*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>='0' && *p<='9'; p++)
                x=x*10+*p-'0';
    else
        for(x=expr(lev+1); strchr(P[lev],*p); x=y)
            y=eval(x,expr(lev+1),*p++);
    return x;
}

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