/in/foo.cc: In function 'void work()':
/in/foo.cc:122:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  for (int i=1;i<=n;i++) head[i]=0;tot=0;
  ^~~
/in/foo.cc:122:35: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for'
  for (int i=1;i<=n;i++) head[i]=0;tot=0;
                                   ^~~