$ ollama run dolphin-mixtral "choose a leetcode hard problem, solve it in Kotlin"
Sure, I can do that. Let's choose the problem "Find Largest Submatrix with All Ones" from LeetCode.
Here is the problem statement:
Given a boolean 2D matrix where each row is sorted in non-decreasing order and all columns are also sorted in non-decreasing order, find
the largest submatrix that contains only ones.
Here is the solution in Kotlin:
fun largestSubmatrix(matrix: Array<IntArray>): Int {
if (matrix.isEmpty()) return 0
val rows = matrix.size
val cols = matrix[0].size
// initialize dynamic programming array with all zeros
val dp = Array(rows) { IntArray(cols) }
// iterate through each column in the matrix
for (c in 0 until cols) {
for (r in 0 until rows) {
// if current cell is one, update dp value with min of row and dp[r - 1][c]
if (matrix[r][c] == 1) {
dp[r][c] = r.coerceAtMost(dp[r - 1][c] + 1)
}
}
}
// find the maximum value in the dp array
var maxArea = 0
for (r in 0 until rows) {
for (c in 0 until cols) {
if (dp[r][c] != 0) {
val area = dp[r][c] * (cols - c)
maxArea = maxOf(maxArea, area)
}
}
}
return maxArea
}
This function takes a 2D boolean matrix as input and returns the size of the largest submatrix with all ones. The algorithm uses dynamic
programming to keep track of the width of the current row for every column. Then it updates the maximum size of the submatrix by
considering each row in the matrix.