Try the following test:
50
3081 30488 b
16217 39416 w
7248 11364 w
17676 32492 w
25292 30974 w
1686 28199 w
9576 25807 w
18823 21457 w
30775 38642 w
7758 15847 b
6289 19805 b
1546 26246 w
27602 30148 w
9296 14836 w
19435 26471 w
27882 35227 w
24453 42158 w
943 1752 b
4080 12268 w
31529 41419 w
6238 22445 w
6262 13797 w
16616 31697 w
9990 12426 w
31675 46085 w
15149 32698 b
16029 18700 b
32372 50450 w
19642 25152 b
21096 30699 b
27244 35134 b
29951 43374 w
8869 9499 w
3375 28256 w
2060 14099 b
19972 37822 b
30222 33297 b
5433 9482 w
28735 54469 b
19053 31004 w
12234 27889 b
19117 19750 b
11927 17069 w
30056 32152 b
21756 25680 w
25656 44214 b
5308 18661 b
21710 26158 b
9196 32476 b
9917 11034 b

I don't know what the output is. Mine was 54496 1000000000