Something strange happening

Revision en2, by ..vince, 2019-03-13 20:20:10

so i was solving https://codeforces.net/contest/1138/problem/E. the idea here is quite obvious. compress all SCC as a single node and solve it like a normal DAG

then something strange happening. at the beginning i got a RTE verdict for my solution. when i was trying to find bugs in my code, i tried to reverse engineer and add this code my first DFS function (i used kosaraju's algorithm) :

if(n == 99998 && m == 99999 && d == 50) { if(u.fi > 100000 || u.se > 50) { cout << "KOSA : " << u.fi << " " << u.se << "\n"; fflush(stdout); } } magically, adding this piece of code to my solution give me an AC verdict.

RTE solution : https://codeforces.net/contest/1138/submission/51269031

AC solution : https://codeforces.net/contest/1138/submission/51268839

so what really happened? is there any error in CF?

History

 
 
 
 
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  Rev. Lang. By When Δ Comment
en3 English ..vince 2019-03-13 20:22:52 59
en2 English ..vince 2019-03-13 20:20:10 25
en1 English ..vince 2019-03-13 20:19:00 889 Initial revision (published)