#include <iostream>
#include <stdio.h>
using namespace std;

const int N=100001;
int p;
char s[N];

int expresie();
int termen();
int factor();

int expresie(){
    int sum=termen();
    while(s[p]=='+'||s[p]=='-'){
        if(s[p]=='+'){
            p++;
            sum+=termen();
        }
        else{
            p++;
            sum+=termen();
        }
    }
    return sum;
}
int termen(){
    int prod=factor();
    while(s[p]=='*'||s[p]=='/'){
        if(s[p]=='*'){
            p++;
            prod*=factor();
        }
        else{
            p++;
            prod/=factor();
        }
    }
    return prod;
}

int factor(){
    int val=0,semn=1;
    while(s[p]=='-'){
        semn=-semn;
        p++;
    }
    if(s[p]=='('){
        p++;
        val=expresie();
        p++;
        return semn*val;
    }
    while(s[p]>='0'&&s[p]<='9'){
        val=val*10+(s[p]-'0');
        p++;
    }
    return semn*val;
}

int main(){

    FILE *fin,*fout;
    fin=fopen("evaluare.in","r");
    fout=fopen("evaluare.out","w");
    int x;

    fscanf(fin,"%s",&s);
    x=expresie();
    fprintf(fout,"%d",x);

    return 0;
}