n = int(input())
A = list(map(lambda x: int(x), input().split()))
print("Yes")
t = n
Ans = []
while t:
    for i in range(n):
        if A[i] == t:
            break
    while i < t-1:
        Ans.append(i+1)
        A[i], A[i+1] = A[i+1], A[i]
        i += 1
    t -= 1
print(len(Ans))
for a in Ans:
    print(a)