# UUID: 0c7df953-5482-4f61-8327-dcba90961004
import sys

def main():
    data = sys.stdin.read().strip().split()
    n = int(data[0])
    arr = list(map(int, data[1:]))

    from collections import defaultdict

    count = defaultdict(int)
    left = 0
    max_len = 0
    max_start = 0

    for right in range(n):
        count[arr[right]] += 1

        while len(count) > 2:
            count[arr[left]] -= 1
            if count[arr[left]] == 0:
                del count[arr[left]]
            left += 1

        if right - left + 1 > max_len:
            max_len = right - left + 1
            max_start = left

    print(max_len)
    print(max_start + 1)

if __name__ == "__main__":
    main()