I want to make this code with random numebr array and time executation? Does anybady nows how can I do?

```
#include <iostream>
using namespace std;
void print(int a[], int sz) {
for (int i = 0; i < sz; i++ ) cout << a[i] << " ";
cout << endl;
}
void CountingSort(int arr[], int sz) {
int i, j, k;
int idx = 0;
int min, max;
min = max = arr[0];
for(i = 1; i < sz; i++) {
min = (arr[i] < min) ? arr[i] : min;
max = (arr[i] > max) ? arr[i] : max;
}
k = max - min + 1;
/* creates k buckets */
int *B = new int [k];
for(i = 0; i < k; i++) B[i] = 0;
for(i = 0; i < sz; i++) B[arr[i] - min]++;
for(i = min; i <= max; i++)
for(j = 0; j < B[i - min]; j++) arr[idx++] = i;
print(arr,sz);
delete [] B;
}
int main()
{
int a[] = {5,9,3,9,10,9,2,4,13,10};
const size_t sz = sizeof(a)/sizeof(a[0]);
print(a,sz);
cout << "----------------------\n" ;
CountingSort(a, sz);
}
```