#include<stdio.h>
char v[100000];
int i;
int eval();
int fact();
int expr();
int eval()
{
    int rez=expr();
    while(v[i]=='+'||v[i]=='-')
    {
        i++;
        if(v[i-1]=='+')
            rez+=expr();
        else
            rez-=expr();
    }
    return rez;
}
int expr()
{
    int rez=fact();
    while(v[i]=='*'||v[i]=='/')
    {
        i++;
        if(v[i-1]=='*')
            rez*=fact();
        else
            rez/=fact();
    }
    return rez;
}
int fact()
{
    int rez=0;
    if(v[i]=='(')
    {
        i++;
        rez=eval();
        i++;
    }
    else
    {
        while(v[i]>='0'&&v[i]<='9')
        {
            rez=rez*10+v[i]-'0';
            i++;
        }
    }
    return rez;
}
int main()
{
    FILE *fin,*fout;
    fin=fopen("evaluare.in","r");
    fout=fopen("evalare.out","w");
    char ch=fgetc(fin);
    int cont=0;
    while(ch!='\n'&&ch!=EOF)
    {
        v[cont]=ch;
        cont++;
        ch=fgetc(fin);
    }
    fprintf(fout,"%d",eval());
    return 0;
}