結果

問題 No.1640 簡単な色塗り
ユーザー 👑 obakyanobakyan
提出日時 2021-11-23 22:56:22
言語 Lua
(LuaJit 2.1.1696795921)
結果
AC  
実行時間 390 ms / 2,000 ms
コード長 2,189 bytes
コンパイル時間 206 ms
コンパイル使用メモリ 5,328 KB
実行使用メモリ 46,640 KB
最終ジャッジ日時 2023-09-08 03:33:32
合計ジャッジ時間 17,370 ms
ジャッジサーバーID
(参考情報)
judge15 / judge14
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 1 ms
4,380 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 1 ms
4,376 KB
testcase_03 AC 1 ms
4,376 KB
testcase_04 AC 252 ms
46,640 KB
testcase_05 AC 270 ms
39,784 KB
testcase_06 AC 1 ms
4,380 KB
testcase_07 AC 1 ms
4,376 KB
testcase_08 AC 1 ms
4,376 KB
testcase_09 AC 1 ms
4,376 KB
testcase_10 AC 228 ms
24,880 KB
testcase_11 AC 163 ms
21,408 KB
testcase_12 AC 154 ms
20,192 KB
testcase_13 AC 376 ms
39,788 KB
testcase_14 AC 359 ms
39,012 KB
testcase_15 AC 95 ms
14,408 KB
testcase_16 AC 127 ms
18,496 KB
testcase_17 AC 289 ms
32,740 KB
testcase_18 AC 19 ms
4,740 KB
testcase_19 AC 137 ms
20,076 KB
testcase_20 AC 200 ms
24,656 KB
testcase_21 AC 167 ms
21,032 KB
testcase_22 AC 14 ms
4,376 KB
testcase_23 AC 229 ms
26,184 KB
testcase_24 AC 53 ms
9,508 KB
testcase_25 AC 140 ms
19,772 KB
testcase_26 AC 257 ms
30,800 KB
testcase_27 AC 85 ms
13,624 KB
testcase_28 AC 341 ms
38,012 KB
testcase_29 AC 262 ms
29,528 KB
testcase_30 AC 21 ms
6,216 KB
testcase_31 AC 175 ms
29,100 KB
testcase_32 AC 155 ms
26,652 KB
testcase_33 AC 97 ms
17,284 KB
testcase_34 AC 127 ms
24,192 KB
testcase_35 AC 96 ms
17,308 KB
testcase_36 AC 19 ms
6,392 KB
testcase_37 AC 31 ms
8,208 KB
testcase_38 AC 157 ms
26,944 KB
testcase_39 AC 58 ms
13,480 KB
testcase_40 AC 62 ms
13,808 KB
testcase_41 AC 131 ms
24,072 KB
testcase_42 AC 75 ms
14,452 KB
testcase_43 AC 74 ms
15,044 KB
testcase_44 AC 74 ms
14,484 KB
testcase_45 AC 52 ms
12,408 KB
testcase_46 AC 24 ms
7,400 KB
testcase_47 AC 15 ms
5,464 KB
testcase_48 AC 161 ms
27,272 KB
testcase_49 AC 7 ms
4,380 KB
testcase_50 AC 1 ms
4,380 KB
testcase_51 AC 1 ms
4,376 KB
testcase_52 AC 378 ms
41,080 KB
testcase_53 AC 390 ms
41,044 KB
07_evil_01.txt AC 966 ms
84,100 KB
07_evil_02.txt AC 1,525 ms
129,144 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 n = io.read("*n")

local parent = {}
for i = 1, n do parent[i] = i end

local function uf_findroot(idx)
  local idx_update = idx
  while parent[idx] ~= idx do
    idx = parent[idx]
  end
  while parent[idx_update] ~= idx do
    parent[idx_update], idx_update = idx, parent[idx_update]
  end
  return idx
end

local as, bs = {}, {}
for i = 1, n do
  local a, b = io.read("*n", "*n")
  as[i], bs[i] = a, b
  local ra, rb = uf_findroot(a), uf_findroot(b)
  parent[b], parent[rb] = ra, ra
end

local group = {}
local g_e = {}
local edge = {}
local edgecnt = {}
for i = 1, n do
  group[i] = {}
  g_e[i] = {}
  edge[i] = {}
  edgecnt[i] = 0
end
for i = 1, n do
  local r = uf_findroot(i)
  table.insert(group[r], i)
end
for i = 1, n do
  local a, b = as[i], bs[i]
  local r = uf_findroot(a)
  table.insert(g_e[r], i)
  edge[a][i], edge[b][i] = true, true
  edgecnt[a] = edgecnt[a] + 1
  if a ~= b then
    edgecnt[b] = edgecnt[b] + 1
  end
end
for i = 1, n do
  if #group[i] ~= #g_e[i] then print("No") os.exit() end
end
print("Yes")
local ans = {}
for i = 1, n do
  ans[i] = 0
end

local function solve(gi)
  local tasks = {}
  local done = 0
  for i = 1, #group[gi] do
    local src = group[gi][i]
    if edgecnt[src] == 1 then
      table.insert(tasks, src)
    end
  end
  while done < #tasks do
    done = done + 1
    local src = tasks[done]
    local ei = next(edge[src])
    ans[ei] = src
    local dst = as[ei] == src and bs[ei] or as[ei]
    edge[dst][ei] = nil
    edgecnt[dst] = edgecnt[dst] - 1
    if edgecnt[dst] == 1 then
      table.insert(tasks, dst)
    end
  end
  if done == #group[gi] then return end
  local ring_spos = false
  for i = 1, #group[gi] do
    local src = group[gi][i]
    if edgecnt[src] == 2 then
      ring_spos = src
      table.insert(tasks, src)
      break
    end
  end
  while done < #tasks do
    done = done + 1
    local src = tasks[done]
    local ei = next(edge[src])
    ans[ei] = src
    local dst = as[ei] == src and bs[ei] or as[ei]
    edge[dst][ei] = nil
    edgecnt[dst] = edgecnt[dst] - 1
    if edgecnt[dst] == 1 then
      table.insert(tasks, dst)
    end
  end
end

for i = 1, n do
  solve(i)
end
print(table.concat(ans, "\n"))
0