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4153 - Grade3
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== Rezolvare == <syntaxhighlight lang="python" line> def verifica_restrictii(n, arce): # Verifică dacă datele de intrare respectă restricțiile if not (1 <= n <= 100) or not all(1 <= i <= n and 1 <= j <= n for i, j in arce): return False return True def noduri_grad_exterior_mic(n, arce): # Inițializează gradele interioare și exterioare ale nodurilor grad_interior = [0] * (n + 1) grad_exterior = [0] * (n + 1) # Calculează gradele interioare și exterioare ale nodurilor for i, j in arce: grad_exterior[i] += 1 grad_interior[j] += 1 # Determină nodurile care au gradul exterior mai mic decât gradul interior noduri = [i for i in range(1, n + 1) if grad_exterior[i] < grad_interior[i]] return noduri def main(): n, m = map(int, input().split()) arce = [tuple(map(int, input().split())) for _ in range(m)] # Verifică dacă datele de intrare respectă restricțiile if not verifica_restrictii(n, arce): print("Datele de intrare nu corespund restrictiilor impuse") return print("Datele de intrare corespund restrictiilor impuse") # Determină nodurile care au gradul exterior mai mic decât gradul interior noduri = noduri_grad_exterior_mic(n, arce) # Afiseaza rezultatul print(len(noduri)) print(' '.join(map(str, sorted(noduri)))) if __name__ == "__main__": main() </syntaxhighlight>
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