local n = io.read("*n")
local k = {}
local box = {}
for i = 1, n do k[i], box[i] = io.read("*n"), false end

local function iskado(i1, i2, i3)
  return (k[i1] ~= k[i3] and (k[i1] - k[i2]) * (k[i2] - k[i3]) < 0)
end

local function getbox(i1, i2, i3)
  local t = {i1, i2, i3}
  local ret = {0, 0, 0}
  for i = 1, 3 do
    local tmp = 0
    for j = 1, n do
      if(not box[j]) then
        tmp = tmp + 1
        if(tmp == t[i]) then
          ret[i] = j
          break
        end
      end
    end
  end
  box[ret[1]], box[ret[2]], box[ret[3]] = true, true, true
  return unpack(ret)
end
local function unsetbox(b1, b2, b3)
  box[b1], box[b2], box[b3] = false, false, false
end
local wd1, wd2, wd3 = 0, 0, 0

local d_win_found = false
for i1_1 = 1, n - 2 do
for i1_2 = i1_1 + 1, n - 1 do
for i1_3 = i1_2 + 1, n do
  wd1, wd2, wd3 = i1_1, i1_2, i1_3
  local b1_1, b1_2, b1_3 = getbox(i1_1, i1_2, i1_3)
  if(iskado(b1_1, b1_2, b1_3)) then
    if(n <= 5) then d_win_found = true
    else
      local e_has_win_route = false
      for i2_1 = 1, n - 5 do
      for i2_2 = i2_1 + 1, n - 4 do
      for i2_3 = i2_2 + 1, n - 3 do
        local b2_1, b2_2, b2_3 = getbox(i2_1, i2_2, i2_3)
        if(iskado(b2_1, b2_2, b2_3)) then
          if(n <= 8) then e_has_win_route = true
          else
            local d_has_win_route = false
            for i3_1 = 1, n - 8 do
            for i3_2 = i3_1 + 1, n - 7 do
            for i3_3 = i3_2 + 1, n - 6 do
              local b3_1, b3_2, b3_3 = getbox(i3_1, i3_2, i3_3)
              if(iskado(b3_1, b3_2, b3_3)) then
                if(n <= 11) then d_has_win_route = true
                else
                  local b4_1, b4_2, b4_3 = getbox(1, 2, 3)
                  if(not iskado(b4_1, b4_2, b4_3)) then
                    d_has_win_route = true
                  end
                  unsetbox(b4_1, b4_2, b4_3)
                end
              end
              unsetbox(b3_1, b3_2, b3_3)
            if(d_has_win_route) then break end
            end
            if(d_has_win_route) then break end
            end
            if(d_has_win_route) then break end
            end
            if(not d_has_win_route) then e_has_win_route = true end
          end
        end
        unsetbox(b2_1, b2_2, b2_3)
      if(e_has_win_route) then break end
      end --i2_3
      if(e_has_win_route) then break end
      end --i2_2
      if(e_has_win_route) then break end
      end --i2_1
      if(not e_has_win_route) then d_win_found = true end
    end--if (6 <= n)
  end
  unsetbox(b1_1, b1_2, b1_3)
if(d_win_found) then break end
end --i1_3
if(d_win_found) then break end
end --i1_2
if(d_win_found) then break end
end --i1_1
if(d_win_found) then
  print(wd1 - 1 .. " " .. wd2 - 1 .. " " .. wd3 - 1)
else
  print(-1)
end