n = raw_input()
n=int(n)
#print n
h = raw_input().split()
for i in range(len(h)):
    h[i] = int(h[i])
#    print i,h[i]
ans1 = 0
ans2 = 0
last_height = 10 ** 9
prev_height = 10 ** 9
last_len = 0
best_len = 10 ** 9
for i in range(0,n):
#    print i, h[i]
    if h[i] == last_height:
        last_len += 1
    else:
        if prev_height < last_height > h[i] and last_len < best_len:
            best_len = last_len
            ans1 = i+1 - last_len - 1
            ans2 = i+1
        prev_height = last_height
        last_height = h[i]
        last_len = 1
if ans1 == 0:
    print 0 
else:
     print ans1, ans2