/in/foo.cc: In function 'void tarjan(int)':
/in/foo.cc:31:2: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
  if (low[now]!=dfn[now]) return; ++cnt;
  ^~
/in/foo.cc:31:34: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
  if (low[now]!=dfn[now]) return; ++cnt;
                                  ^~