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2835 - Gen Mat 26
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== Rezolvare == <syntaxhighlight lang="python" line="1"> # 2835 Gen Mat 26 def validare(nr_elemente, prima_linie): # functia de validare a datelor de intrare if 2 <= nr_elemente <= 20 and nr_elemente == len(prima_linie): # print("Datele de intrare corespund restrictiilor impuse") return True else: raise ValueError("") # daca nu corespund, ridicam eroarea ValueError def gen_mat26(nr_linii, prima_linie): matrice = [] # initializarea matricii patratice for linie in range(nr_linii): linia = [] for coloana in range(nr_linii): linia.append(0) matrice.append(linia) matrice[0] = prima_linie # prima linie e chiar cea citita for linie in range(1, nr_linii): # parcurgem matricea de la a doua linie ultimul_numar = matrice[linie-1][nr_linii-1] # ultimul numar trebuie sa ajunga pe prima pozitie deci il salvam for coloana in range(nr_linii-1, -1, -1): # parcurgem coloanele de la ultima spre prima if coloana == 0: matrice[linie][coloana] = ultimul_numar # priimul numar devine ultimul else: matrice[linie][coloana] = matrice[linie-1][coloana-1] # restul iau valoarea elementului din spate for linie in range(nr_linii): # afisarea for coloana in range(nr_linii): print(matrice[linie][coloana], end=" ") print() if __name__ == '__main__': # ne asteptam ca datele de intrare sa fie gresite fapt care ar genera o eroare de tipul ValueError # pe care o tratam corespunzator try: n = int(input("Introduceti numarul n: ")) # citirea lui n sir = input(f"Introduceti prima linie ( {n} numere cu spatii intre ele): ") # citirea liniei sir = sir.split() sir = list(map(int, sir)) validare(n, sir) # validarea datelor de intrare gen_mat26(n, sir) except ValueError: print("Datele de intrare nu corespund restrictiilor impuse") </syntaxhighlight>
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