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View Compilation Error

0_0_38663496_16840.cpp: In function 'long long int dfs1(long long int, long long int)':
0_0_38663496_16840.cpp:69:32: error: 'dfs' was not declared in this scope; did you mean 'dfs1'?
   69 |                 if(v!=fa) sg^=(dfs(v,u)+1); //所有子节点的sg值+1异或
      |                                ^~~
      |                                dfs1


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