_QWOiNYUIVMPFSBKLiGSMAP_'s blog

By _QWOiNYUIVMPFSBKLiGSMAP_, history, 19 months ago, In English,

can anyone explain to me it's solution proof ?

 
 
 
 
  • Vote: I like it
  • 0
  • Vote: I do not like it