foo.cc: In function 'int Quchong(int*, int)':
foo.cc:25:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   25 |  else
      |  ^~~~
foo.cc:27:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
   27 |   return n-k;
      |   ^~~~~~

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