Hi.

I've submitted Problem C Round #395 (Div. 2). Why when I change these line

u=nodeColor.get(i);
v=nodeColor.get(a.get(i).get(j));
if (u!=v)

>>Full code

become

if ((Integer)nodeColor.get(i)!=(Integer)nodeColor.get(a.get(i).get(j)))

>>Full code

it get wrong answer?

Thanks!

I try to solve this problem 459C - Pashmak and Buses

It has Time limit exceeded on test 9

I printed the result to screen, it took nearly 25s:

But when I print to a file, run time is 94 ms:

Can you explain the different between two methods?

Thanks.

P/s: same code

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