First and last occurrences of X

#include<bits/stdc++.h>
using namespace std;

int main() {
	int t;
	scanf("%d", &t);
	while (t--) {
		int n, x, i;
		cin >> n >> x;
		int arr[n];
		for (i = 0; i < n; i++) cin >> arr[i];
		int l = 0, r = n - 1, mid, start = -1, end = -1;
		while (l <= r) {
			mid = l + ((r - l) / 2);
			if (arr[mid] == x) {
				start = mid;
				end = mid;
				int temp = mid;
				while (arr[--temp] == x) {
					start--;
				}
				while (arr[++mid] == x) {
					end++;
				}
				break;
			}
			else if (arr[mid] < x)
				l = mid + 1 ;
			else
				r = mid - 1 ;
		}
		if (l > r)
			cout << -1 << endl;
		else
			cout << start  << " " << end  << endl;
	}
	return 0;
}