#include<stdio.h>
char s[100005];
char *p=s;
int factor();
int termen();

int eval(){
    int r=factor();
    while(*p=='+'||*p=='-'){
        if(*p=='+'){
            ++p;
            r=r+factor();
        }
        else{
            ++p;
            r=r-factor();
        }
    }
    return r;
}

int factor(){
    int r=termen();
    while(*p=='*'||*p=='/'){
        if(*p=='*'){
            ++p;
            r=r*termen();
        }
        else{
            ++p;
            r=r/termen();
        }
    }
    return r;
}

int termen(){
    int r;
    if(*p=='('){
        p++;
        r=eval();
        p++;
    }
    else{
        r=0;
        while(*p<='9'&&*p>='0'){
            r=r*10+*p-'0';
            p++;
        }
    }
    return r;
}


int main(){
    freopen("eval.in","r",stdin);
    freopen("eval.out","w",stdout);
    scanf("%s",&s);
    //int *p=s;
    printf("%d",eval());
}