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How to Solve Minimum Operations to Write the Letter Y on a Grid Problem
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Medium#3071
LeetCode ProblemMinimum Operations to Write the Letter Y on a Grid
You are given a 0-indexed n x n grid where n is odd, and grid[r][c] is 0, 1, or 2. We say that a cell belongs to the Letter Y if it belongs to one of the following: The Letter Y is written on the grid if and only if: Return the minimum number of operations needed to write the letter Y on the grid given that in one operation you can change the value at any cell to 0, 1, or 2.
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Problem Breakdown
Understanding the Minimum Operations to Write the Letter Y on a Grid Problem
Let's break down this LeetCode problem and understand what makes it challenging in interview settings.
Problem Statement
You are given a 0-indexed n x n grid where n is odd, and grid[r][c] is 0, 1, or 2. We say that a cell belongs to the Letter Y if it belongs to one of the following: The Letter Y is written on the grid if and only if: Return the minimum number of operations needed to write the letter Y on the grid given that in one operation you can change the value at any cell to 0, 1, or 2.
MediumProblem #3071
LeetCodeMinimum Operations to Write the Letter Y on a Grid
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Examples
# Example 1
Input
grid = [[1,2,2],[1,1,0],[0,1,0]]
Output
3
# Example 2
Input
grid = [[0,1,0,1,0],[2,1,0,1,2],[2,2,2,0,1],[2,2,2,2,2],[2,1,2,2,2]]
Output
12
Constraints
3 <= n <= 49
n == grid.length == grid[i].length
0 <= grid[i][j] <= 2
n is odd.
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Solve Minimum Operations to Write the Letter Y on a Grid — You are given a 0-indexed n x n grid where n is odd, and grid[r][c] is 0, 1, or ...
Here's the optimal approach using Array:
def solve(input):
# Optimal O(n) solution
return result
Time: O(n) | Space: O(n)
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