foo.cc: In function ‘void lca2(long long int, long long int)’:
foo.cc:50:9: warning: this ‘if’ clause does not guard... [-Wmisleading-indentation]
   50 |         if(!w[v])ans++;w[v]=1;
      |         ^~
foo.cc:50:24: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘if’
   50 |         if(!w[v])ans++;w[v]=1;
      |                        ^