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  ______     ___     ______      ___      ______  
 /_   _//   / _ \\  |      \\   / _ \\   /_   _// 
   | ||    | / \ || |  --  //  / //\ \\    | ||   
  _| ||    | \_/ || |  --  \\ |  ___  ||  _| ||   
 /__//      \___//  |______// |_||  |_|| /__//    
 `--`       `---`   `------`  `-`   `-`  `--`

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Text this: An approximation algorithm for quay crane scheduling with handling priority in port container terminals