N = int(input())
P = list(map(int, input().split()))

print("Yes")

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

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