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3906 - suma perm cif
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== Rezolvare == <syntaxhighlight lang="python3" line="1"> from itertools import permutations def calculate_sum_of_permutations(n): # Convertim numărul într-o listă de cifre digits = [int(digit) for digit in str(n)] # Verificăm dacă cifrele sunt distincte if len(digits) != len(set(digits)): raise ValueError("Cifrele trebuie să fie distincte.") # Generăm toate permutările cifrelor all_permutations = permutations(digits) # Calculăm suma permutărilor și le afișăm total_sum = 0 for perm in all_permutations: perm_number = int(''.join(map(str, perm))) total_sum += perm_number return total_sum def validate_n(n): # Verificăm restricțiile return 1 <= n <= 10**9 - 1 def main(): try: n = int(input("Introduceți un număr cu cifre distincte: ")) # Verificăm restricțiile utilizând funcția separată if not validate_n(n): print("Numărul trebuie să fie mai mic decât 10^9.") return # Calculăm suma și o afișăm result = calculate_sum_of_permutations(n) print(f"Suma tuturor numerelor obținute prin rearanjarea cifrelor lui {n} este: {result}") except ValueError as e: print(e) if __name__ == "__main__": main() </syntaxhighlight>
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