Editing 2446 - Numere 24 (section)

== Rezolvare == 
<syntaxhighlight lang="python" line>
def validare_numar(numar, limit):
    if not numar.isdigit():
        return False
    if int(numar) < 0 or int(numar) > limit:
        return False
    return True


def validare_numere(n, x, k, c):
    if c == 1:
        return validare_numar(n, 2000000000)
    elif c == 2:
        return all(validare_numar(numar, 2000000000) for numar in [x])
    elif c == 3:
        return validare_numar(k, 50)
    return False


def constr_sir():
    sir = [str(i) for i in range(10)]
    for i in range(1, 10):
        sir.append(str(i * 10 + i))
    for i in range(1, 100):
        for j in range(10):
            s = str(i) + str(j) + str(i)[::-1]
            sir.append(s)
    return sir


def cerinta_1(n):
    sir = constr_sir()
    numere_eliminate = []
    i = 0
    while len(numere_eliminate) < n:
        if sir[i] not in numere_eliminate and sir[i] != sir[i][::-1]:
            numere_eliminate.append(sir[i])
            sir[i] = sir[i][:-1]
        else:
            i += 1
    return numere_eliminate[-1]


def cerinta_2(x):
    sir = constr_sir()
    counts = [0, 0, 0]
    for i in range(len(sir)):
        if sir[i][-1] == x:
            counts[0] += 1
            if len(sir[i]) >= 2 and sir[i][-2] == x // 10:
                counts[1] += 1
                if len(sir[i]) >= 3 and sir[i][-3] == x // 100:
                    counts[2] += 1
    return counts


def cerinta_3(k):
    sir = constr_sir()
    count = 0
    for num in sir:
        if len(num) == k:
            count += 1
        elif len(num) > k:
            break
    return count


if __name__ == '__main__':
    with open('numere24.in', 'r') as f:
        c = int(f.readline().strip())
        n, x, k = map(int, f.readline().split())

    if validare_numere(n, x, k, c):
        print("Datele sunt introduse corect.")
        if c == 1:
            result = cerinta_1(n)
            with open('numere24.out', 'w') as f:
                f.write(str(result) + '\n')
        elif c == 2:
            counts = cerinta_2(x)
            with open('numere24.out', 'w') as f:
                f.write(' '.join(map(str, counts)) + '\n')
        elif c == 3:
            count = cerinta_3(k)
            with open('numere24.out', 'w') as f:
                f.write(str(count) + '\n')
    else:
        print("Datele nu corespund restricțiilor impuse.")

</syntaxhighlight>