Cod sursa(job #2412727)

Utilizator refugiatBoni Daniel Stefan refugiat Data 22 aprilie 2019 15:06:26
Problema Bool Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.42 kb
#include <fstream>
#include <iostream>
#include <cstring>
using namespace std;
ifstream si("bool.in");
ofstream so("bool.out");
int fr[30];
char exp[1010], *p=exp, c;
int n;
bool _and();
bool term();
bool _or();
bool term() {
    bool rez=0;
    if(*p=='(') {
        p++;
        rez=_or();
        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 _and() {
    bool r=term();
    while(*p=='A'&&*(p+1)=='N') {
        p+=4;
        r=r&term();
    }
    return r;
}

bool _or() {
    bool r=_and();
    while(*p=='O'&&*(p+1)=='R') {
        p+=3;
        r=r|_and();
    }
    return r;
}
int main() {
    si.getline(exp,1000);
    si>>n;
    si.get();
    for(int i=1; i<=n; i++) {
        si>>c;
        fr[c-'A']=!fr[c-'A'];
        p=exp;
        so<<_or();
    }
    return 0;
}