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#include <cstdio>

using namespace std;

#define MAX_SIZE 1000002

int arr[MAX_SIZE];
int n;

int main() {
	scanf("%d", &n);

	for (int i = 0; i < n; i++)
	{
		scanf("%d", arr + i);
	}

	printf("0\n");
	printf("2\n");
	printf("1 2");

	return 0;
}