So I've made an embarrassingly large number of submissions for this problem. Thing is I submitted in C++ 11 and got WA 1. Afterwards I switched to Visual C++/G++ and got WA 2. Apparently this was caused by asserts that I had left in my program to check if test 1 is actually the example. After I removed them I got Accepted, but still WA 1 in C++11. So my questions would be:

1. Why did it get WA in C++ 11?
2. Why didn't the assert crash the program?