Given two sorted integer arrays nums1 and nums2, merge nums2 into nums1 as one sorted array.
Note:
You may assume that nums1 has enough space (size that is greater or equal to m + n) to hold additional elements from nums2. The number of elements initialized in nums1 and nums2 are m and n respectively.
public class Solution {
public void merge(int[] nums1, int m, int[] nums2, int n) {
int end = m+n-1;
int idx1 = m-1;
int idx2 = n-1;
while(idx1 >= 0 && idx2 >= 0){
if(nums1[idx1] > nums2[idx2]) nums1[end--] = nums1[idx1--];
else nums1[end--] = nums2[idx2--];
}
while(idx1 >= 0) nums1[end--] = nums1[idx1--];
while(idx2 >= 0) nums1[end--] = nums2[idx2--];
}
}