I use simple BFS, but I have wa4;
Can anybody help me???

BFS doesn't work here, since you have edges of different lengths, that's why WA. Think of other algorithm

I used BFS and got very fast AC

OpenGL, can you check my solution, if yes - give me your mail.

2 OpenGL: if you use BFS with dequeue - then yes, it's OK. But usual BFS with queue - it's WA