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 > Run-Length Decoding

Run-Length Decoding

Difficulty: 1000 2000 ms 128 MB

strings

Undo run-length encoding: the input alternates a letter and a positive count (possibly multi-digit). a3b12 becomes aaabbbbbbbbbbbb.

Input: one line with the encoded string.

Output: the decoded string.

Constraints:

  • decoded length ≤ 105
  • counts are 1..99
  • letters are lowercase

Sample Tests

Input 1
a3b12
Output 1
aaabbbbbbbbbbbb
Input 2
z1
Output 2
z

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