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1329 – Șir Zigzag
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=== Rezolvare ver. 2 === <syntaxhighlight lang="python" line> # citim numarul de elemente din sir numar_elemente = int(input("Introduceti numarul de elemente din sir: ")) # validam daca numarul de elemente se afla in intervalul permis if numar_elemente < 3 or numar_elemente > 1000: print("Numarul de elemente trebuie sa fie intre 3 si 1000") exit() # citim sirul de numere si validam ca fiecare element se afla in intervalul permis sir = list(map(int, input("Introduceti sirul de numere: ").split())) for numar in sir: if numar < 0 or numar > 1000000000: print("Numerele trebuie sa fie intre 0 si 1 000 000 000") exit() # initializam o variabila care va retine daca sirul este zigzag sau nu este_zigzag = True # parcurgem sirul si verificam monotonia triplurilor de elemente consecutive for i in range(1, numar_elemente - 1): if not ((sir[i-1] < sir[i] and sir[i] > sir[i+1]) or (sir[i-1] > sir[i] and sir[i] < sir[i+1])): este_zigzag = False break print("Datele sunt introduse corect.") # afisam rezultatul if este_zigzag: print("DA") else: print("NU") print("Datele sunt introduse corect.") </syntaxhighlight>
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