The teacher said that this problem is more difficult to agree more, or only 90min.
There are also several pit T1, ooo, ooo, I feel a bit like a super-simplified version of Landlords.
T2: is not difficult but required a particularly complex 70+ lines of code, but more difficult than Illustrating really want to write, but still successful and hanging.
T3: did not have time to do, alas.
T4: would also need some knowledge of physics, anyway, the amount of code required 150+ pair of auxiliary data structure, cheat points leave.
Score: 90 + 0 + 15 + 5 = 110pts