34. Find First and Last Position of Element in Sorted Array

class Solution {
    public int[] searchRange(int[] nums, int target) {
        int[] res=new int[]{-1,-1};
        if(nums.length==0) return res;
        int start=0,end=nums.length-1;
        
        while(start<end){
            int mid = start + (end-start)/2;
            
            if(nums[mid]>=target){
                end = mid;
            }
            else{
                start = mid+1;
            }
        }
        
        if(nums[start] != target){
            return res;
        }
        
        res[0] = start;
        
        end = nums.length;
        
        while(start<end){
            int mid = start + (end-start)/2;
            
            if(nums[mid] > target){
                end=mid;
            }
            else{
                start = mid +1;
            }
        }
        
        res[1] = start -1;
        
        return res;
    }
}