foo.cc: In function 'int main()':
foo.cc:23:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   23 |  for(int i=w;i>=1;i--)cout<<a[i];cout<<endl;
      |  ^~~
foo.cc:23:34: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   23 |  for(int i=w;i>=1;i--)cout<<a[i];cout<<endl;
      |                                  ^~~~

[Hydro](https://hydro.ac)提供评测服务