Problem	dragonfly
User	Pan
Submission Time	2024-03-03 00:10:10
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

dragonfly.cpp: In function ‘void dfs2(ll, ll)’:
dragonfly.cpp:150:61: error: ‘used’ was not declared in this scope
150 | if (counter>b[c]) newmaxx = root->kth(in[c]+1, out[c]+1, used+b[c]);
| ^~~~