1/10 + 2/10 = 3/10 a doua zi
1/10 + 3/10 = 4/10 a treia zi
1/10 + 3/10 + 4/10 = 8/10 in total
10/10 - 8/10 = 2/10 mai trebuie dusa
100 * 1/10 = 10 t prima zi
100 * 3/10 = 30 t a doua zi
100 * 4/10 = 40 t a treia zi
100 - 10 - 30 - 40 = 20 t mai trebuie adusa in depozit