n = int(input())
ys = list(map(int, input().split(" ")))
left  = [None for _ in range(n)]
right = [None for _ in range(n)]

for index in range(1, n):
    if ys[index] > ys[index-1]:
        left[index] = 1
        continue
    if ys[index] == ys[index-1]:
        if left[index-1] is not None:
            left[index] = left[index-1] + 1

for index in range(n-2, -1, -1):
    if ys[index] > ys[index+1]:
        right[index] = 1
        continue
    if ys[index] == ys[index+1]:
        if right[index+1] is not None:
            right[index] = right[index+1] + 1

min_value, best_index = float("inf"), None
for index in range(1, n-1):
    if left[index] is None or right[index] is None:
        continue
    if left[index] + right[index] < min_value:
        min_value = left[index] + right[index]
        best_index = index

if best_index is None:
    print(0)
else:
    print(best_index, best_index + min_value)

# print(left)
# print(right)