Editing 1359 - Ecuatie 2 (section)

== Rezolvare ==
<syntaxhighlight lang="python" line>
# 1359 - Ecuatie 2
def validare(ecuatie1):           # functia de validare a datelor de intrare
    if len(ecuatie1) > 1000:
        raise ValueError

    # daca datele de intrare nu corespund, ridicam eroarea ValueError
    for caracter in ecuatie1:
        if not (caracter.isdigit() or caracter in ['+', '-', '*', ':', 'x', '=']):
            raise ValueError

    # extract a and b from the equation
    parts = ecuatie1.split('=')
    a = int(''.join(filter(str.isdigit, parts[0])))
    b = int(''.join(filter(str.isdigit, parts[1])))

    # check if a and b are within the given range
    if not (1 <= a <= 30000 and 1 <= b <= 30000):
        raise ValueError

    file_out.write("Datele de intrare corespund restrictiilor impuse\n")


def rezolva_ecuatie(ecuatie1):                     # functia de rezolvare
    if "+x=" in ecuatie1:
        a, b = map(int, ecuatie1.split("+x="))
        return 1, b - a
    elif "x+" in ecuatie1:
        a, b = map(int, ecuatie1.split("x+"))
        return 2, b - a
    elif "-x=" in ecuatie1:
        a, b = map(int, ecuatie1.split("-x="))
        return 3, a - b
    elif "x-" in ecuatie1:
        a, b = map(int, ecuatie1.split("x-"))
        return 4, a + b
    elif "*x=" in ecuatie1 and int(ecuatie1.split("*x=")[1]) % int(ecuatie1.split("*x=")[0]) == 0:
        a, b = map(int, ecuatie1.split("*x="))
        return 5, b // a
    elif "x*" in ecuatie1:
        _, temp = ecuatie1.split("x*")
        a, b = map(int, temp.split("="))
        return 6, b // a
    elif ":x=" in ecuatie1 and int(ecuatie1.split(":x=")[0]) % int(ecuatie1.split(":x=")[1]) == 0:
        a, b = map(int, ecuatie1.split(":x="))
        return 7, a // b
    elif "x:" in ecuatie1:
        _, temp = ecuatie1.split("x:")
        a, b = map(int, temp.split("="))
        return 8, a // b


if __name__ == '__main__':
    file_in = open("ecuatie2in.txt", "r")         # declararea fisierelor
    file_out = open("ecuatie2out.txt", "w")       # fisierul out trebuie declarat cu optiunea "w" (write)

    # din cauza datelor de intrare pot aparea 2 tipuri de erori, valueError sau IndexError pe care le tratam
    try:
        ecuatie = file_in.readline()      # citirea ecuatiei se face ca sir de caractere

        validare(ecuatie)                 # apelul functiei de validare
        tip_ecuatie, solutie = rezolva_ecuatie(ecuatie)               # apelul functiei de rezolvare

        file_out.write(str(tip_ecuatie) + '\n')
        file_out.write(str(solutie) + '\n')

    except ValueError:
        file_out.write("Datele de intrare nu corespund restrictiilor impuse")
    except IndexError:
        file_out.write("Datele de intrare nu corespund restrictiilor impuse")

</syntaxhighlight>