In pauza de pranz, Ovidiu aduce un tort ca sa sarbatoreasca impreuna cu colegii de birou.

B. Tort

Cum pot n persoane sa taie un tort in n parti astfel incat fiecare sa fie multumit ca primeste cel putin 1/n (chiar daca ceilalti nu sunt de incredere)? Spre exemplu, pentru cazul particular n=2, pentru ca fiecare sa fie multumit ca primeste cel putin jumatate, o persoana taie tortul si cealalta persoana isi alege partea.

Sursa: Martin Garden

In the lunch break, Ovidiu brings a birthday cake for his colleagues. 

B. Birthday Cake

How can n persons cut a cake in n parts so that everyone is happy to get at lease 1/n? For example, for n = 2 one person cuts the cake and the other chooses its part, so everyone is happy to get at least half of the cake.

Source: Martin Gardner