krsu 2259 (29 points)

# by: senb1 aka amigo

n = int(input())
a = list(map(int, input().split()))

m = 0
ops = []
for i in range(n):
    for j in range(1, n):
        if a[j-1] > a[j]:
            a[j] += a[j-1]
            ops.append((j-1, j))
            m += 1

print(m)
for x, y in ops:
    print(x+1, y+1)