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4068 - Grade K
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== Rezolvare == <syntaxhighlight lang="python3" line="1"> def verifica_restrictii(n, k, muchii): # Verificăm restricțiile impuse if not (1 <= n <= 100): return False if not (1 <= k <= n): return False for i, j in muchii: if not (1 <= i <= n) or not (1 <= j <= n): return False return True def noduri_cu_grad_egalcu_k(n, k, muchii): graf = {} # Inițializăm dicționarul grafului for i in range(1, n+1): graf[i] = set() # Adăugăm muchiile în graf for muchie in muchii: i, j = muchie graf[i].add(j) graf[j].add(i) # Calculăm gradul nodului k grad_k = len(graf[k]) # Determinăm nodurile cu gradul egal cu gradul nodului k noduri_egale = [nod for nod, vecini in graf.items() if len(vecini) == grad_k] return noduri_egale # Citim datele de intrare try: with open("gradekIN.txt", "r") as f: n, k = map(int, f.readline().split()) muchii = [tuple(map(int, line.split())) for line in f.readlines()] # Verificăm restricțiile if not verifica_restrictii(n, k, muchii): raise ValueError # Determinăm nodurile cu gradul egal cu gradul nodului k noduri_rezultat = noduri_cu_grad_egalcu_k(n, k, muchii) # Scriem rezultatul în fișierul de ieșire with open("gradekOUT.txt", "w") as f: if noduri_rezultat: f.write(str(len(noduri_rezultat)) + "\n") f.write(" ".join(map(str, noduri_rezultat))) else: f.write("Nu există noduri cu gradul egal cu gradul nodului k") except ValueError: with open("gradekOUT.txt", "w") as f: f.write("Datele nu corespund restrictiilor impuse") except Exception as e: with open("gradekOUT.txt", "w") as f: f.write("A apărut o eroare în timpul procesării datelor.\n") f.write(str(e)) </syntaxhighlight>
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