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 > Counting the Carries > Editorial

Counting the Carries — Solution & Editorial

Back to the Problem

Simulate the column addition, propagating the carry — note a carry can trigger the next carry (999 + 1).

Complexity: O(digits)

Watch out: 9 + 0 + carry = 10 — incoming carries create outgoing ones; 999+1 has three carries.