print max length vector
maxChain = [ ] NEW_LINE for x in L : NEW_LINE INDENT if len ( x ) > len ( maxChain ) : NEW_LINE INDENT maxChain = x NEW_LINE DEDENT DEDENT for pair in maxChain : NEW_LINE INDENT print ( " ( { a } , { b } ) " . format ( a = pair . a , b = pair . b ) , end = " ▁ " ) NEW_LINE DEDENT print ( ) NEW_LINE