What does this C snippet output?

1#include <stdio.h>
2void minmax(const int *a, int n,
3            int *mn, int *mx) {
4    *mn = a[0];
5    *mx = a[0];
6    for (int i = 1; i < n; i++) {
7        if (a[i] < *mn) *mn = a[i];
8        if (a[i] > *mx) *mx = a[i];
9    }
10}
11int main(void) {
12    int a[5] = {4, 1, 7, 3, 9};
13    int lo, hi;
14    minmax(a, 5, &lo, &hi);
15    printf("%d %d\n", lo, hi);
16    return 0;
17}