R - Compare lists and flag matches

I have 2 lists and I need to identify and then flag where there is a match between list 1 and list 2.

Example:

List 1  List 2
   1      1
   2      2
   3      3
   4      4
   5      5
   6    
   7    
   8    
   9    
  10    

Desired Output:

List 1  Match
  1       Y
  2       Y
  3       Y
  4       Y
  5       Y
  6       N
  7       N
  8       N
  9       N
  10      N

I tried a combination of an if statement wrapped in a loop but that just produced negative result regardless of a match. Any help would be much appreciated!