#include <stdio.h>

#define MAX_N 5010
#define inf 2147000000

int n;
int A[MAX_N], c[MAX_N], vine[MAX_N];

void cit() {
	freopen("subsir2.in", "r", stdin);
	freopen("subsir2.out", "w", stdout);

    scanf("%d", &n);
	for (int i = 1; i <= n; i++)
		scanf("%d", &A[i]);
}

void solve() {
	c[n] = 1; vine[n] = 0;
	for (int i = n - 1; i >= 1; i--) {
		c[i] = inf;
		int val = inf;

		for (int j = i + 1; j <= n; j++) {
			if (A[j] >= A[i] && A[j] < val) {
				val = A[j];
				if (c[i] > c[j] + 1) {
					c[i] = c[j] + 1;
					vine[i] = j;
				}
				else if (c[i] == c[j] + 1 && A[j] < A[vine[i]]) 
						vine[i] = j;
			}
		}
	}
}

void write() {
	int vmin = inf, sol = inf, poz = 0;
	for (int i = 1; i <= n; i++)
		if (A[i] < vmin) {
			if (c[i] < sol) {
				sol = c[i];
				poz = i;
			}
			vmin = A[i];
		}

	printf("%d\n", sol);
	while (poz) {
		printf("%d ", poz);
		poz = vine[poz];
	}
	printf("\n");
}

int main() {

	cit();	
	solve();
	write();

	return 0;
}