#1977Medium· asked at 8 companies
Walls and Gates
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What we know
Example 1
Input: rooms = [[INF,-1,0,INF],[INF,INF,INF,-1],[INF,-1,INF,-1],[0,-1,INF,INF]] Output: [[3,-1,0,1],[2,2,1,-1],[1,-1,2,-1],[0,-1,3,4]]
Example 2
Input: rooms = [[-1]] Output: [[-1]]
Constraints
- •
m == rooms.length - •
n == rooms[i].length - •
1 <= m, n <= 250 - •
rooms[i][j]is -1, 0, or 2^31 - 1.