public class Solution {
    public void merge(int A[], int m, int B[], int n) {
        int i = m-1, j=n-1,k=m+n-1;
        while(i>=0 && j>=0){
            A[k--] = A[i]>B[j]?A[i--]:B[j--];
        }
        
        while(j>=0){
            A[k--] = B[j--];
        }
  
    }
}