public int removeDup(int[] A){

int length = A.length;

if (length<3)

return length;

int len = 2;

for(int i=2;i<length;i++){

if(A[i]!=A[len-1] || (A[i] == A[len-1] && A[i] != A[len-2])){

A[len] = A[i];

len++;

}

}

return len;

}

public static void main(String[] args) {

// TODO Auto-generated method stub

}