foo.cc: In function ‘int main()’:
foo.cc:21:9: warning: this ‘else’ clause does not guard... [-Wmisleading-indentation]
   21 |         else
      |         ^~~~
foo.cc:23:17: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the ‘else’
   23 |                 n-=1;
      |                 ^