加权双向查找

[计] weighted bidirectional search

jiā quán shuāng xiàng chá zhǎo ㄐㄧㄚ ㄑㄩㄢˊ ㄕㄨㄤ ㄒㄧㄤˋ ㄔㄚˊ ㄓㄠˇ