Pattern

Opposite Ends

7 problems in the roadmap use this pattern.

• Valid Palindrome Easy

  in Two Pointers

  Reported at: MetaAmazonMicrosoft+3
• Valid Palindrome II Easy

  in Two Pointers

  Reported at: MetaAmazonApple+4
• Reverse String Easy

  in Two Pointers

  Reported at: AmazonMicrosoftMeta+3
• Squares of a Sorted Array Easy

  in Two Pointers

  Reported at: MetaAmazonGoogle+2
• Two Sum II - Input Array Is Sorted Medium

  in Two Pointers

  Reported at: AmazonGoogleApple+2
• Container With Most Water Medium

  in Two Pointers

  Reported at: AmazonMicrosoftMeta+6
• Trapping Rain Water Hard

  in Two Pointers

  Reported at: AmazonMetaMicrosoft+12