
#include <iostream>
using namespace std;
class sort1{
public: void mergelist(int Data[], int first, int mid, int last);
void mergeSort(int A[], int ledt, int right);
};
// trien khai cac ham trong class
void sort1::mergelist(int Data[], int first, int mid, int last){
int tmp[100];
int first1 = first;
int last1 = mid;
int first2 = mid+1;
int...