Problem	friend
User	Xiaoyang
Submission Time	2023-11-30 22:28:54
Score	0
Max Time	N/A
Max Memory	N/A

Compile Error

friend.cpp: In function ‘ll dfs(ll, ll, bool)’:
friend.cpp:38:23: error: ‘i’ was not declared in this scope
38 | dp[u][flag]=max(dp[i][flag],dfs(x,u,0));
| ^