Statement

In the last months, Alessandro and Carlo became tired of working day and night for IIOT rounds and decided to ditch the Final Round and go on a trip to Olbia. As they enjoyed their time on the stunning beaches of Sardinia, they stumbled upon a large heap of aliga means rubbish in Sardinian dialect.: that eyesore could only have been the doing of Valerio, a native Sicilian, who is actively trying to lure tourists from Sardinia to his homeland. Alessandro and Carlo would love to mind their own business, yet driven by a sense of duty (and certainly not by the smell of all that aliga), they agreed that Valerio has to be stopped! The aliga is placed in a very distinctive way: every bag is marked with labels from 0 to N-1 and the rubbish bags' arrangement forms a tree with N nodes (where the edges are the trails Valerio left as he placed the bags). Despite his role as a villain, Valerio remains a man of honor...