Leetcode Problem 1615. Maximal Network Rank

1615. Maximal Network Rank

Leetcode Solutions

Key approach of the solution

  1. Initialize a hash map adj to store the adjacency list of each city.
  2. Iterate over each road in the roads array and update the adjacency list for both cities involved in the road.
  3. Initialize a variable maxRank to keep track of the maximum network rank found.
  4. Iterate over all possible pairs of cities (city1, city2).
    • Calculate the network rank for the pair as the sum of the in-degrees of city1 and city2.
    • If city1 and city2 are directly connected, subtract 1 from the sum to avoid double-counting.
    • Update maxRank if the current network rank is greater than the previously recorded maximum.
  5. Return maxRank as the result.
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Alternative approach using edge counting

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