Task: Given two arrays A and B of size N and M respectively. Sort the array A based on elements in B. If A elements not present in B then append them at the end in sorted order. Example: Input: 1 11 4 2 1 2 5 7 1 9 3 6 8 8 2 1 8 3 Output: 2 2 1 1 8 8 3 5 6 7 9 Here is the Code: Program in C++: #include<iostream> #include<bits/stdc++.h> using namespace std; int main()  { 	 int t; 	 cin>>t; 	 while(t--) 	 { 	     int n,m; 	     cin>>n>>m; 	     int a[n],b[m]; 	     map<int,int> rs; 	     for(int i=0;i<n;i++) 	     { 	         cin>>a[i]; 	         rs[a[i]]++; 	     } 	     for(int i=0;i<m;i++) 	     { 	         cin>>b[i]; 	         if(rs.find(b[i])!=rs.end()) 	         { 	             int t = rs[b[i]]; 	   ...
Understanding can make things are Nothing.