Rotting Oranges

📝 Description

Calculate time until all fresh oranges are rotten (BFS)

Input Format

2D grid (0=empty, 1=fresh, 2=rotten)

Output Format

Minutes elapsed or -1 if impossible

Constraints

m == grid.length n == grid[i].length

🔍 Sample Input

[[2,1,1],[1,1,0],[0,1,1]]
            

✅ Sample Output

4