結果
問題 | No.1995 CHIKA Road |
ユーザー | 👑 obakyan |
提出日時 | 2022-07-02 01:01:04 |
言語 | Lua (LuaJit 2.1.1696795921) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,528 bytes |
コンパイル時間 | 76 ms |
コンパイル使用メモリ | 5,372 KB |
実行使用メモリ | 41,536 KB |
最終ジャッジ日時 | 2023-08-17 12:48:12 |
合計ジャッジ時間 | 9,430 ms |
ジャッジサーバーID (参考情報) |
judge13 / judge14 |
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
4,376 KB |
testcase_01 | AC | 1 ms
4,376 KB |
testcase_02 | AC | 1 ms
4,376 KB |
testcase_03 | AC | 2 ms
4,380 KB |
testcase_04 | AC | 2 ms
4,376 KB |
testcase_05 | WA | - |
testcase_06 | AC | 34 ms
4,864 KB |
testcase_07 | AC | 116 ms
10,948 KB |
testcase_08 | AC | 3 ms
4,380 KB |
testcase_09 | AC | 4 ms
4,380 KB |
testcase_10 | AC | 63 ms
6,120 KB |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | AC | 56 ms
6,456 KB |
testcase_17 | AC | 252 ms
19,604 KB |
testcase_18 | AC | 426 ms
27,536 KB |
testcase_19 | AC | 429 ms
27,744 KB |
testcase_20 | AC | 223 ms
18,640 KB |
testcase_21 | AC | 201 ms
14,940 KB |
testcase_22 | AC | 412 ms
26,956 KB |
testcase_23 | AC | 117 ms
11,092 KB |
testcase_24 | AC | 359 ms
25,188 KB |
testcase_25 | AC | 64 ms
7,116 KB |
testcase_26 | AC | 143 ms
13,136 KB |
testcase_27 | AC | 341 ms
24,840 KB |
testcase_28 | AC | 206 ms
15,156 KB |
testcase_29 | AC | 406 ms
27,240 KB |
testcase_30 | AC | 62 ms
6,728 KB |
testcase_31 | AC | 32 ms
4,584 KB |
testcase_32 | AC | 85 ms
8,160 KB |
testcase_33 | AC | 338 ms
24,668 KB |
testcase_34 | AC | 35 ms
5,064 KB |
testcase_35 | AC | 131 ms
11,472 KB |
testcase_36 | AC | 154 ms
13,388 KB |
testcase_37 | AC | 386 ms
26,164 KB |
testcase_38 | AC | 265 ms
19,932 KB |
testcase_39 | AC | 28 ms
4,524 KB |
ソースコード
local mfl, mce = math.floor, math.ceil local mmi, mma = math.min, math.max local pow2 = {1} for i = 2, 28 do pow2[i] = pow2[i - 1] * 2 end local SegTree = {} SegTree.updateAll = function(self) for i = self.stagenum - 1, 1, -1 do local cnt = pow2[i] for j = 0, cnt - 1 do self.stage[cnt + j] = self.func(self.stage[(cnt + j) * 2], self.stage[(cnt + j) * 2 + 1]) end end end SegTree.create = function(self, n, func, emptyvalue) self.func, self.emptyvalue = func, emptyvalue local stagenum, mul = 1, 1 self.stage = {} -- use 1D Tree (stage[], not stage[][]) while mul < n do mul, stagenum = mul * 2, stagenum + 1 end self.stagenum = stagenum for i = 1, mul * 2 - 1 do self.stage[i] = emptyvalue end for i = 1, n do self.stage[mul + i - 1] = i end self:updateAll() end SegTree.update = function(self, idx, force) idx = idx + pow2[self.stagenum] - 1 for i = self.stagenum - 1, 1, -1 do local dst = mfl(idx / 2) local rem = dst * 4 + 1 - idx self.stage[dst] = self.func(self.stage[idx], self.stage[rem]) if not force and self.stage[dst] ~= self.stage[idx] then break end idx = dst end end SegTree.new = function(n, func, emptyvalue) local obj = {} setmetatable(obj, {__index = SegTree}) obj:create(n, func, emptyvalue) return obj end local n, m = io.read("*n", "*n") local tm = {} local a, b = {}, {} for i = 1, m do a[i], b[i] = io.read("*n", "*n") tm[a[i]], tm[b[i]] = true, true end tm[n] = true local tuniq = {} for k, v in pairs(tm) do table.insert(tuniq, k) end table.sort(tuniq) local tn = #tuniq for i = 1, tn do tm[tuniq[i]] = i end local inf = 1000000007 * 10 local len = {} local asked = {} local edge = {} for i = 1, tn do len[i] = inf asked[i] = false edge[i] = {} end len[1] = 0 asked[tn + 1] = true for i = 1, tn - 1 do local x, y = tuniq[i], tuniq[i + 1] edge[i][i + 1] = (y - x) * 2 end for i = 1, m do local ai, bi = a[i], b[i] local ap, bp = tm[ai], tm[bi] edge[ap][bp] = (bi - ai) * 2 - 1 end local function mergefunc(x, y) if asked[x] then return y elseif asked[y] then return x else return len[x] < len[y] and x or y end end local st = SegTree.new(tn, mergefunc, tn + 1) for i = 1, tn do local src = st.stage[1] if asked[src] then break end if inf <= len[src] then break end asked[src] = true st:update(src, true) for dst, cost in pairs(edge[src]) do if len[src] + cost < len[dst] then len[dst] = len[src] + cost st:update(dst) end end end print(len[tn])