<prompt> Programu ya Python inapaswa kuwa na ugumu wa wakati wa O mn, ambapo m na n ni urefu wa safu za pembejeo.  <response>: Mfumo wa kushughulikia ni pamoja na: kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia kushughulikia hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua hatua 