n = io.read("*n")
prev, f = nil, 0
min = -1
for i = 1, n do
    a = io.read("*n")
    if(prev == nil) then
        prev, f = a, a
    else
        if(min == -1) then min = a - prev else min = math.min(min, a - prev) end
        prev = a
    end
end
io.write(string.format("%d\n%d\n", min, prev - f))