N
newArray[count++] = nums1[i++];
nums1[i] < nums2[j]
Y
j <= n
STOP
newArray[count++] = nums2[j++]
新建newArray
newArray[count++] = nums1[i++]
k++
nums1[k]=newArray[k];
i < m
输入nums1、nums2
i >= m
j < n
i < m && j < n
START
k<newArray.length
