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

if P == [*range(N)]:
    print("Yes")
    print(0)
    exit()

ans = []

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

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