#include<stdio.h>
#include<string.h>
char o[4][4]={"+-","*/"},s[100000],*p=s;
int L(int a,int b,char o) {
    switch(o) {
        case '+':return a+b;
        case '-':return a-b;
        case '*':return a*b;
        case '/':return a/b;
    }
}
int E(int l) {
    int x,y;
    if(l==2)
        if(*p=='(')
            ++p,x=E(0),++p;
        else
            for(x=0;*p>='0'&&*p<='9';++p)
                x=x*10+*p-'0';
    else
        for(x=E(l+1);strchr(o[l],*p);x=y,*p++)
            if(*p=='+')
                y=x+E(l+1);
            else if(*p=='-')
                y=x-E(l+1);
            else if(*p=='*')
                y=x*E(l+1);
            else if(*p=='/')
                y=x/E(l+1);
    return x;
}
int main() {
    fgets(s,100000,fopen("evaluare.in","r"));
    fprintf(fopen("evaluare.out","w"),"%d",E(0));
}