foo.cc: In function 'long long int y(long long int)':
foo.cc:24:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   24 |  for(i=2;i*i<=n;i++)
      |  ^~~
foo.cc:30:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   30 |   return f;
      |   ^~~~~~

[Hydro](https://hydro.ac)提供评测服务