Cod sursa(job #2411597)

Utilizator CezarTDTodirisca Cezar CezarTD Data 20 aprilie 2019 21:36:22
Problema Bool Scor 100
Compilator cpp-32 Status done
Runda Arhiva de probleme Marime 1.54 kb
#include <fstream>
#include <cstring>
using namespace std;

ifstream fin("bool.in");
ofstream fout("bool.out");

int fr[30];
char exp[1010],*p=exp,c;
int n;

bool si();
bool term();
bool sau();


bool term()
{
    bool rez=0;
    if(*p=='(')
    {
        p++;
        rez=sau();
        p++;
    }
    else
    {
        if(*p=='N' && *(p+1)=='O')
        {
            p+=4;
            rez=!term();
        }
        else
        {
            if(*p=='T' && *(p+1)=='R')
            {
                p+=5;
                rez=1;
            }
            else
            {
                if(*p=='F' && *(p+1)=='A')
                {
                    p+=6;
                    rez=0;
                }
                else
                {
                    if(isalpha(*p))
                    {
                        rez=fr[*p-'A'];
                        p+=2;
                    }
                    else
                        p+=2;
                }
            }
        }
    }
    return rez;
}

bool si()
{
    bool r=term();
    while(*p=='A' && *(p+1)=='N')
    {
        p+=4;
        r=r&term();
    }
    return r;
}

bool sau()
{
    bool r=si();
    while(*p=='O' && *(p+1)=='R')
    {
        p+=3;
        r=r|si();
    }
    return r;
}


int main()
{
    fin.getline(exp,1000);
    fin>>n;
    fin.get();
    for(int i=1; i<=n; i++)
    {
        fin>>c;
        fr[c-'A']=!fr[c-'A'];
        p=exp;
        fout<<sau();
    }
    return 0;
}