#include<stdio.h>
int p[102], a[102];
int ans[10004], m;
int main()
{
	int n;
	scanf("%d", &n);
	int i, j;
	for (i = 0; i < n; i++)
		scanf("%d", &p[i]);
	for (i = 0; i < n; i++)
		a[i] = i + 1;
	m = 0;
	for (i = 0; i < n; i++)
	{
		for (j = i; p[j] != a[i]; j++);
		while (j > i)
		{
			ans[m++] = j;
			p[j] ^= p[j - 1];
			p[j - 1] ^= p[j];
			p[j] ^= p[j - 1];
			j--;
		}
	}
	printf("Yes\n%d\n", m);
	for (i = 0; i < m; i++)
		printf("%d\n", ans[i]);
	return 0;
}