#include <stdio.h>
char s[100001];
int p;
int expresie();
int termen();
int factor();

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

int termen(){
    int prod=factor();
    while(s[p]=='*'||s[p]=='/'){
        if(s[p]=='*'){
            p++;
            prod=prod*termen();
        }
        else{
            p++;
            prod=prod/termen();
        }
    }
    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()
{
    int x;
    FILE *fin,*fout;
    fin=fopen("ecaluare.in","r");
    p=0;
    s[p]=fgetc(fin);
    p++;
    while((s[p-1]>='0'&&s[p-1]<='9')||s[p-1]=='*'||s[p-1]=='+'||s[p-1]=='-'||s[p-1]=='/'||s[p-1]=='('||s[p-1]==')'){
        s[p]=fgetc(fin);
        p++;
    }
    fclose(fin);
    p=0;
    x=expresie();
    fout=fopen("expresie.out","w");
    fprintf(fout,"%d",x);
    fclose(fout);
    return 0;
}