N = int(input())
P = [int(s) - 1 for s in input().split()]

idx_P = [None] * N
for i, p in enumerate(P):
    idx_P[p] = i

ans = []

for times in range(N):
    for i in range(N - 1):
        if idx_P[i] > idx_P[i + 1]:
            ans.append(i + 1)
            idx_P[i], idx_P[i + 1] = idx_P[i + 1], idx_P[i]

print("Yes")
print(len(ans))
print(*ans, sep="\n")