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0603 - Vraja
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== Rezolvare == <syntaxhighlight lang="python" line> # 0603 - Vraja def validare(nr_arbori, inaltime_vraja, inaltime_arbori): # Daca datele sunt invalide v-om face raise la eroarea ValueError conditii = ( nr_arbori >= 1, nr_arbori <= 1000, inaltime_vraja >= 1, inaltime_vraja <= 1000 ) if not all(conditii): raise ValueError for inaltime in inaltime_arbori: if (not (inaltime > 0 and inaltime < 1000000)): raise ValueError def vraja(nr_arbori, inaltime_vraja, inaltime_arbori): # Vom parcurge arborii în ordine inversă și vom determina pentru fiecare # arbore câte vrăji trebuie să i se aplice pentru a deveni cel puțin # la fel de înalt ca următorul. # Pentru aceasta, vom determina diferența de înălțime dintre cei doi # arbori și vom afla numărul de vrăji necesare împărțind diferența la h. # Apoi vom actualiza înălțimea copacului curent. num_vraji = 0 for i in range(nr_arbori - 2, -1, -1): if inaltime_arbori[i] < inaltime_arbori[i+1]: diferenta = inaltime_arbori[i+1] - inaltime_arbori[i] nr_vraja = diferenta // inaltime_vraja if (nr_vraja * inaltime_vraja < diferenta): nr_vraja += 1 num_vraji += nr_vraja inaltime_arbori[i] += nr_vraja * inaltime_vraja print(num_vraji) if __name__ == '__main__': # Citim de la tastatura numerele cerute nr_arbori = int(input()) inaltime_vraja = int(input()) inaltime_arbori = [] for i in range(nr_arbori): inaltime = int(input()) inaltime_arbori.append(inaltime) # Verificam daca datele introduse sunt valide # daca nu afisam mesajul corespunsador try: validare(nr_arbori, inaltime_vraja, inaltime_arbori) except ValueError: print("Nu au fost respectate cerintele impuse") else: print("Datele de intrare corespund restricțiilor impuse") vraja(nr_arbori, inaltime_vraja, inaltime_arbori) </syntaxhighlight>
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