Leetcode Problem 1130. Minimum Cost Tree From Leaf Values

1130. Minimum Cost Tree From Leaf Values

Leetcode Solutions

Stack Solution for Minimum Cost Tree From Leaf Values

  1. Initialize a stack with infinity as the only element and a variable res to store the result.
  2. Iterate through each element a in the array arr:
    • While the top of the stack is less than or equal to a:
      • Pop the top element mid from the stack.
      • Calculate the cost as mid * min(stack.peek(), a) and add it to res.
    • Push a onto the stack.
  3. After the loop, while the stack has more than two elements:
    • Pop the top element and multiply it with the new top of the stack, adding the result to res.
  4. Return res as the minimum cost.
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Dynamic Programming Solution for Minimum Cost Tree From Leaf Values

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