結果

問題 No.1312 Snake Eyes
ユーザー 👑 obakyanobakyan
提出日時 2022-01-09 23:38:00
言語 Lua
(LuaJit 2.1.1696795921)
結果
AC  
実行時間 42 ms / 2,000 ms
コード長 2,365 bytes
コンパイル時間 189 ms
コンパイル使用メモリ 6,944 KB
実行使用メモリ 12,024 KB
最終ジャッジ日時 2024-11-14 10:36:35
合計ジャッジ時間 5,167 ms
ジャッジサーバーID
(参考情報)
judge1 / judge2
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 30 ms
11,676 KB
testcase_01 AC 27 ms
11,804 KB
testcase_02 AC 28 ms
11,772 KB
testcase_03 AC 2 ms
6,820 KB
testcase_04 AC 1 ms
6,816 KB
testcase_05 AC 28 ms
11,804 KB
testcase_06 AC 28 ms
11,836 KB
testcase_07 AC 29 ms
11,708 KB
testcase_08 AC 28 ms
11,976 KB
testcase_09 AC 28 ms
11,816 KB
testcase_10 AC 28 ms
11,840 KB
testcase_11 AC 27 ms
11,704 KB
testcase_12 AC 29 ms
11,864 KB
testcase_13 AC 28 ms
11,872 KB
testcase_14 AC 28 ms
11,848 KB
testcase_15 AC 31 ms
11,868 KB
testcase_16 AC 28 ms
11,768 KB
testcase_17 AC 28 ms
11,804 KB
testcase_18 AC 29 ms
11,856 KB
testcase_19 AC 28 ms
11,820 KB
testcase_20 AC 28 ms
11,824 KB
testcase_21 AC 27 ms
11,872 KB
testcase_22 AC 27 ms
11,852 KB
testcase_23 AC 28 ms
11,928 KB
testcase_24 AC 28 ms
11,824 KB
testcase_25 AC 28 ms
11,740 KB
testcase_26 AC 28 ms
11,924 KB
testcase_27 AC 29 ms
11,804 KB
testcase_28 AC 27 ms
11,708 KB
testcase_29 AC 27 ms
11,804 KB
testcase_30 AC 28 ms
11,864 KB
testcase_31 AC 28 ms
11,916 KB
testcase_32 AC 29 ms
11,824 KB
testcase_33 AC 28 ms
11,804 KB
testcase_34 AC 28 ms
11,848 KB
testcase_35 AC 29 ms
11,812 KB
testcase_36 AC 28 ms
11,816 KB
testcase_37 AC 28 ms
11,872 KB
testcase_38 AC 28 ms
11,908 KB
testcase_39 AC 35 ms
11,916 KB
testcase_40 AC 30 ms
11,908 KB
testcase_41 AC 36 ms
11,828 KB
testcase_42 AC 35 ms
11,808 KB
testcase_43 AC 35 ms
11,920 KB
testcase_44 AC 35 ms
11,884 KB
testcase_45 AC 29 ms
11,880 KB
testcase_46 AC 35 ms
11,704 KB
testcase_47 AC 36 ms
11,860 KB
testcase_48 AC 37 ms
11,856 KB
testcase_49 AC 37 ms
11,840 KB
testcase_50 AC 36 ms
11,876 KB
testcase_51 AC 36 ms
12,024 KB
testcase_52 AC 38 ms
11,816 KB
testcase_53 AC 37 ms
11,872 KB
testcase_54 AC 39 ms
11,812 KB
testcase_55 AC 37 ms
11,876 KB
testcase_56 AC 34 ms
11,888 KB
testcase_57 AC 36 ms
11,808 KB
testcase_58 AC 37 ms
11,860 KB
testcase_59 AC 31 ms
11,772 KB
testcase_60 AC 36 ms
11,880 KB
testcase_61 AC 37 ms
11,812 KB
testcase_62 AC 32 ms
11,808 KB
testcase_63 AC 28 ms
11,852 KB
testcase_64 AC 28 ms
11,804 KB
testcase_65 AC 29 ms
11,824 KB
testcase_66 AC 28 ms
11,860 KB
testcase_67 AC 28 ms
11,704 KB
testcase_68 AC 27 ms
11,708 KB
testcase_69 AC 27 ms
11,828 KB
testcase_70 AC 28 ms
11,708 KB
testcase_71 AC 28 ms
11,740 KB
testcase_72 AC 28 ms
11,804 KB
testcase_73 AC 28 ms
11,868 KB
testcase_74 AC 30 ms
11,812 KB
testcase_75 AC 28 ms
11,824 KB
testcase_76 AC 42 ms
11,936 KB
testcase_77 AC 38 ms
11,864 KB
testcase_78 AC 38 ms
11,876 KB
testcase_79 AC 28 ms
11,816 KB
testcase_80 AC 38 ms
11,700 KB
testcase_81 AC 36 ms
11,740 KB
testcase_82 AC 29 ms
11,832 KB
testcase_83 AC 37 ms
11,736 KB
testcase_84 AC 38 ms
11,844 KB
testcase_85 AC 28 ms
11,808 KB
testcase_86 AC 28 ms
11,840 KB
testcase_87 AC 37 ms
11,704 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

local mce, mfl, msq, mmi, mma, mab = math.ceil, math.floor, math.sqrt, math.min, math.max, math.abs

local function getprimes(x)
  local primes = {}
  local allnums = {}
  for i = 1, x do allnums[i] = true end
  for i = 2, x do
    if allnums[i] then
      table.insert(primes, i)
      local lim = mfl(x / i)
      for j = 2, lim do
        allnums[j * i] = false
      end
    end
  end
  return primes
end

local function getdivisorparts(x, primes)
  local prime_num = #primes
  local tmp = {}
  local lim = mce(msq(x))
  local primepos = 1
  local dv = primes[primepos]
  while primepos <= prime_num and dv <= lim do
    if x % dv == 0 then
      local t = {}
      t.p = dv
      t.cnt = 1
      x = mfl(x / dv)
      while x % dv == 0 do
        x = mfl(x / dv)
        t.cnt = t.cnt + 1
      end
      table.insert(tmp, t)
      lim = mce(msq(x))
    end
    if primepos == prime_num then break end
    primepos = primepos + 1
    dv = primes[primepos]
  end
  if x ~= 1 then
    local t = {}
    t.p, t.cnt = x, 1
    table.insert(tmp, t)
  end
  return tmp
end

local function getdivisorCore(divisorparts)
  local t = {}
  local pat = 1
  local len = #divisorparts
  local allpat = 1
  for i = 1, len do
    allpat = allpat * (1 + divisorparts[i].cnt)
  end
  for t_i_pat = 0, allpat - 1 do
    local div = allpat
    local i_pat = t_i_pat
    local ret = 1
    for i = 1, len do
      div = mfl(div / (divisorparts[i].cnt + 1))
      local mul = mfl(i_pat / div)
      i_pat = i_pat % div
      for j = 1, mul do
        ret = ret * divisorparts[i].p
      end
    end
    table.insert(t, ret)
  end
  table.sort(t)
  return t
end

local function getdivisor(x, primes)
  local dvp = getdivisorparts(x, primes)
  return getdivisorCore(dvp)
end
local n = io.read("*n")
if n == 1 then print(2) os.exit() end
if n == 2 then print(3) os.exit() end
local lim = 1000 * 1000
local primes = getprimes(lim)
local dv = getdivisor(n, primes)
local cand = 0
for i = #dv, 1, -1 do
  local a = dv[i]
  local b = mfl(n / a)
  if a < b - 1 then
    cand = b - 1 break
  end
end
for i = 2, lim do
  local v = i + 1
  local found = false
  while v <= n do
    if n % v == 0 then
      local w = mfl(n / v)
      if w < i then
        cand = mmi(cand, i)
        found = true
        break
      end
    end
    v = v * i + 1
  end
  if found then break end
end
print(cand)
0