degree of length n to store the degree of each city.roads array and increment the degree of both cities connected by each road.(city, degree) and sort it by degree in descending order.values of length n to store the value assigned to each city.n down to 1 based on the sorted order.totalImportance to store the sum of importance of all roads.roads array and add the sum of values of the two cities connected by each road to totalImportance.totalImportance.