#include<stdio.h>
char s[100000];
int n;
int E(int l) {
    int x,y;
    if(l==2)
        if(s[n]=='(')
            n++,x=E(0),n++;
        else
            for(x=0;s[n]>='0'&&s[n]<='9';n++)
                x=x*10+s[n]-'0';
    else
        for(x=E(l+1);!l?(s[n]=='+'||s[n]=='-'):(s[n]=='*'||s[n]=='/');x=y)
            if(s[n]=='+')
                n++,y=x+E(l+1);
            else if(s[n]=='-')
                n++,y=x-E(l+1);
            else if(s[n]=='*')
                n++,y=x*E(l+1);
            else if(s[n]=='/')
                n++,y=x/E(l+1);
    return x;
}
int main() {
    freopen("evaluare.in","r",stdin),freopen("evaluare.out","w",stdout),gets(s),printf("%d",E(0));
}