n = int(input())
m = [int(x) for x in input().split()]

r= []
sz = []

for i in range(n):
    if i == 0:
        r.append(m[i])
    else:
        if r[-1] == m[i]:
            if len(r) > 1:
                sz.append(r)
            r = [m[i]]
        else:
            r.append(m[i])
if len(r) > 1:
    sz.append(r)
print(len(sz))
if len(sz) > 0:
    print(max([len(r) for r in sz]))
else:
    print(-1)