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Given a sorted integer array without duplicates, return the summary of its ranges.

For example, given [0,1,2,4,5,7], return ["0->2","4->5","7"].

Credits:

Special thanks to  for adding this problem and creating all test cases.

code:

public class Solution {   public List
   
     summaryRanges(int[] nums) { 		 List
    
      list = new ArrayList
     
      ();		 if(nums==null || nums.length==0)	            return list;		 		 if(nums.length==1){			list.add(nums[0]+"");			 return list;		 }		 int start=nums[0],end=nums[0];		 for(int i=1; i
      
        list, int start, int end){		if(start == end)			list.add(start+"");		else			list.add(start+"->"+end);	}}
      
     
    
   

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