n,k = map(int, input().split())
hash = [0]*1000001
now = 0
a = list(map(int, input().split()))
ans = 0
l = 0
 
for r in range(n):
	hash[a[r]]+=1
	if hash[a[r]] == 1: now+=1
	while (now>k):
		hash[a[l]]-=1
		if (hash[a[l]]==0): now-=1
		l+=1
	if r-l+1>ans:
		al = l
		ar = r
		ans = r-l+1
print(al+1,ar+1)