foo.cc: In function 'int bingbao(int)':
foo.cc:79:2: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   79 |  else
      |  ^~~~
foo.cc:81:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
   81 |   {
      |   ^

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