#include <iostream>
using namespace std;
int *tab, *tab2;
void merge(int start_1, int koniec_1, int start_2, int koniec_2){
for(int i = start_1; i <= koniec_2; i++){
tab2[i] = tab[i];
}
int i = start_1;
int j = start_2;
int k = start_1;
while(k < koniec_2){
while(i <= koniec_1 && j <= koniec_2){
if(tab2[i] <= tab2[j]){
tab[k++] = tab2[j++];
}else{
tab[k++] = tab2[i++];
}
}
while(i <= koniec_1){
tab[k++] = tab2[i++];
}
while(j <= koniec_2){
tab[k++] = tab2[j++];
}
}
}
void merge_sort(int start, int koniec){
if(start < koniec){
int m = (start + koniec) / 2;
merge_sort(start, m);
merge_sort(m + 1, koniec);
merge(start, m, m + 1, koniec);
}
}
int main(){
ios_base::sync_with_stdio(false);
int z;
cin >> z;
while(z--){
int n, k;
cin >> n >> k;
tab = new int[n + 1];
tab2 = new int[n + 1];
for(int i = 1; i <= n; i++){
cin >> tab[i];
}
merge_sort(1, n);
for(int i = 1; i <= n; i++){
cout << tab[i] << " ";
}
cout << endl;
delete [] tab;
delete [] tab2;
}
return 0;
}
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