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2106 - Armonica
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== Rezolvare == <syntaxhighlight lang="python" line="1"> # 2106 - Armonica def validare(valoaree_b): # functia de validare a datelor de intrare if valoaree_b < 1 or valoaree_b > 1000000000: raise ValueError fisier_iesire.write("Datele introduse corespund restrictiilor impuse.\n") def progresie_armonica(valoaree_b): # functia de rezolvare rezultat = [] for valoaree_a in range(1, valoaree_b + 1): valoaree_c = (valoaree_a * valoaree_b) / (2 * valoaree_a - valoaree_b) if valoaree_c.is_integer() and valoaree_c >= valoaree_a: rezultat.append((valoaree_a, int(valoaree_c))) if valoaree_a != valoaree_c: # Daca a si c sunt diferite, adaugam si perechea (c, a) rezultat.append((int(valoaree_c), valoaree_a)) return rezultat if __name__ == '__main__': fisier_intrare = open("armonicain.txt", "r") # declararea fisierelor fisier_iesire = open("armonicaout.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: valoare_b = int(fisier_intrare.readline()) # citirea datelor de intrare validare(valoare_b) # apelul functiei de validare rezultate = progresie_armonica(valoare_b) # apelul functiei de rezolvare rezultate.sort(key=lambda x: x[0] + x[1]) # Sortam solutiile in functie de suma a + c fisier_iesire.write(f"{len(rezultate)}\n") for valoare_a, valoare_c in rezultate: fisier_iesire.write(f"{valoare_a} {valoare_c}\n") except ValueError: fisier_iesire.write("Datele introduse nu corespund restrictiilor impuse.") </syntaxhighlight>
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