from itertools import pairwise
 
def findCriticalPoints(values):
    n = len(values)
    if n < 3:
        return [-1, -1]
 
    critical_indices = []
 
    for i in range(1, n - 1):
        if (values[i] > values[i - 1] and values[i] > values[i + 1]) or \
           (values[i] < values[i - 1] and values[i] < values[i + 1]):
            critical_indices.append(i)
 
    if len(critical_indices) < 2:
        return [-1, -1]
 
    minDist = min(b - a for a, b in pairwise(critical_indices))
    maxDist = critical_indices[-1] - critical_indices[0]
 
    return [minDist, maxDist]
 
 
n = int(input())  
values = list(map(int, input().split()))
 
result = findCriticalPoints(values)
print(result[0], result[1])
 

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9
1 3 2 2 3 2 2 2 7