1.Write a java program to count the number of Dragon. Dragon classification such as {1 1 2 2 5 3 4 4 1 3 3} and see the largest Dragon species in the Dragon species counting must not be more than 1 different codes to belong to the same group, for example {1 1 2 2 5 3 4 4 1 3 3} can be organized into 4 groups: {1 1 2 2 1} {2 2 3 3 3} {3 3 3 4 4 4 } {5 4 4} The number of Dragon species. is 3 and 4, there are 6 Dragon

input 12

1 1 2 2 5 3 4 4 4 1 3 3

output data 6