LeetCode 从排序好的列表中删除重复元素

从排序好的列表中删除重复元素

Given input array A = [1,1,2],

Your function should return length = 2, and A is now [1,2].

java 版本如下

 public static int removeDuplicates(int[] A) {
	        if(A == null || A.length == 0) return 0;
	        
	        int pre = 0,cur = 1, pos = 1;
	        while(cur < A.length){
	            if(A[cur] != A[pre]){
	                A[pos] = A[cur];
	                pos++;
	            }
	            pre++;
	            cur++;
	        }

	        return pos;
	    }