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0318 - Cerc
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==Rezolvare== <syntaxhighlight lang="python" line="1"> #0318 Cerc from itertools import permutations def suma_produselor(perm): return sum(perm[i] * perm[(i + 1) % len(perm)] for i in range(len(perm))) def aranjeaza_pe_cerc(n, numere): permutari = list(permutations(numere)) permutari.sort(key=lambda perm: (-suma_produselor(perm), perm)) return permutari[0] def validate_input(n, numere): if not isinstance(n, int) or n <= 0: return False, "Numărul n trebuie să fie un număr întreg pozitiv." if len(numere) != n or len(set(numere)) != n: return False, f"Trebuie să introduceți exact {n} numere distincte." return True, None def main(): try: with open("cerc.in", "r") as file: n = int(file.readline().strip()) numere = list(map(int, file.readline().split())) except (ValueError, FileNotFoundError): print("Date de intrare invalide sau fișierul nu există.") return is_valid, error_message = validate_input(n, numere) if not is_valid: print("Date de intrare invalide:", error_message) return rezultat = aranjeaza_pe_cerc(n, numere) with open("cerc.out", "w") as file_out: file_out.write(" ".join(map(str, rezultat))) if __name__ == "__main__": main() </syntaxhighlight>
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