Leetcode: Matchsticks to Square && Grammar: reverse an primative array
RememberthestoryofLittleMatchGirl?Bynow,youknowexactlywhatmatchsticksthelittlematchgirlhas,pleasefindoutawayyoucanmakeonesquarebyusingupallthosematchsticks.Youshouldnotbreakanystick,butyoucanlinkthemu