lk | likou | lc | leetcode
aw | acwing
cf | codeforces
vj | vjudge
lg | luogu
nk | niuke | nowcoder
hdu | hangdian
ecnu | hsd | huashida
jsk | jisuanke
aly | aliyun
txy | tengxunyun | tencentcloud
dnspod
lk | likou | lc | leetcode