The Sequence

CodeChefOpen on judge ↗

Two good friends M.H. and S.K.M. like to play with digits.... One fine morning another friend A.D. gave them a huge stream of digits and asked some rather 'simple' questions. The two good friends M.H. and S.K.M. scrathed their heads and could not come up with an efficient solution. Can you help them? The digit stream presented was 0123456789101112131415161718......... A.D.'s rather simple que

HINT LADDERno hints yet

L1 Observation

L2 Technique

L3 Approach

L4 Pseudo-code

🔒

L5 Full solution

L5 unlocks only if you insist twice

solution.cppC++17

CodeSearch Tutor

Hints, not spoilers — it won’t hand over the full solution unless you insist.

voice by Sarvam AI