Hiring process8 levels
  1. 1 IQ Test
  2. 2 Additional Online Test (If Required)
  3. 3 Office Interview with Hiring Manager
  4. 4 Unpaid Test Task (Motivation Check)
  5. 5 Paid Test Task and Follow-Up Interview
  6. 6 Iterative Paid Test Tasks
  7. 7 Office Verification
  8. 8 Final Interview with the Founder

Problems > Paths Around the Walls > Editorial

Paths Around the Walls — Solution & Editorial

Back to the Problem

dp[i][j] = dp[i−1][j] + dp[i][j−1] unless the cell is a wall (then 0); one row suffices in memory.

Complexity: O(NM)