/in/foo.cc: In function 'int main()':
/in/foo.cc:47:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
         for(int i=1;i<=n;i++)
         ^~~
/in/foo.cc:49:13: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
             for(int i=1;i<=n;i++)
             ^~~
/in/foo.cc: In function 'int dfs(int)':
/in/foo.cc:34:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^