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1400 - E Palindrom
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== Rezolvare == <syntaxhighlight lang="python" line="1"> # 1400 E Palindrom def verificare(nr_elem): if 1 <= nr_elem <= 10000: return True else: raise ValueError def e_palindrom(n): frecventa = [] # avem nevoie de un vector de frecventa pentru a vedea de cate ori apare fiecare numar for i in range(10001): # numerele introduse sunt mai mici de 10000 frecventa.append(0) for i in range(n): numar = int(input("Introduceti un numar: ")) # citirea numerelor din sir, daca nu se pot converti la int # va fi eroare de tipul ValueError pe care o tratam in main frecventa[numar] += 1 print("Datele introduse corespund restricțiilor impuse.") nr_impare = 0 # numaram cate numere apar de numar impar de ori for numar in frecventa: if numar % 2 == 1: nr_impare += 1 if nr_impare >= 2: # daca sunt mai mult de 2 numere atunci nu poate fi palindrom print("NU") return print("DA") return if __name__ == '__main__': try: N = int(input("Introduceti numarul de elemente ale sirului: ")) # citirea lui n verificare(N) # apelul functiei de verificare e_palindrom(N) # apelul functiei de rezolvare except ValueError: # daca apare eroare din cauza datelor de intrare afisam mesajul print("Datele introduse nu corespund restricțiilor impuse.") </syntaxhighlight>
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