Leetcode Problem 375. Guess Number Higher or Lower II

375. Guess Number Higher or Lower II

Leetcode Solutions

Approach # Using Dynamic Programming

Initialize a 2D array dp of size (n+1) x (n+1) with all elements set to 0.
Loop over the lengths of ranges from 2 to n.
For each length len, loop over all possible starting points i of the range.
Calculate the ending point j of the range as i + len - 1.
For each range (i, j), try every possible pivot k from i to j.
Calculate the cost for each pivot as k + max(dp[i][k-1], dp[k+1][j]).
Take the minimum of these costs to fill dp[i][j].
After filling the entire dp table, return dp[1][n] as the answer.

Approach # Brute Force

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