local n = io.read("*n")
local m = io.read("*n")
local a = {}; do
  for i = 1, n do
    a[i] = io.read("*n")
  end
end

local psum_ave = {(a[1] / 1)}; do
  for i = 2, n do
    psum_ave[i] = (psum_ave[i - 1] * (i - 1) + a[i]) / i
  end
end

local psum_ave_min = psum_ave[1]; do
  for i = 2, n do
    if psum_ave[i] < psum_ave_min then
      psum_ave_min = psum_ave[i]
    end
  end
end

print(math.floor(psum_ave_min / m))