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<?php $grades=array(-4,-1,0,1,6,10,70,99,100,101,105,110); foreach($grades as $grade){ if( ($grade+1)*(101-$grade) > 0 ){ // ($grade minus negative [lower limit])*([upper limit] plus $grad) $validGrades[] = $grade; }else{ $invalidGrades[] = $grade; } } var_export($validGrades); var_export($invalidGrades);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => 0, 1 => 1, 2 => 6, 3 => 10, 4 => 70, 5 => 99, 6 => 100, )array ( 0 => -4, 1 => -1, 2 => 101, 3 => 105, 4 => 110, )

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