結果
問題 | No.845 最長の切符 |
ユーザー | 👑 obakyan |
提出日時 | 2019-07-06 20:20:10 |
言語 | Lua (LuaJit 2.1.1696795921) |
結果 |
WA
|
実行時間 | - |
コード長 | 2,073 bytes |
コンパイル時間 | 101 ms |
コンパイル使用メモリ | 5,120 KB |
実行使用メモリ | 11,904 KB |
最終ジャッジ日時 | 2024-10-01 08:38:02 |
合計ジャッジ時間 | 2,125 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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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 | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 4 ms
5,248 KB |
testcase_03 | WA | - |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 2 ms
5,248 KB |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | AC | 2 ms
5,248 KB |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | AC | 1 ms
5,248 KB |
testcase_26 | AC | 140 ms
11,648 KB |
testcase_27 | AC | 1 ms
5,248 KB |
testcase_28 | AC | 166 ms
11,648 KB |
testcase_29 | WA | - |
ソースコード
local mce, mfl, msq, mmi, mma = math.ceil, math.floor, math.sqrt, math.min, math.max local function heldkarp_prepare(n) local tot = 1 local alltask = {} local stagetask = {} for i = 1, n do tot = tot * 2 alltask[i] = {} stagetask[i] = {} end for i = 1, n do for j = 1, tot - 1 do alltask[i][j] = 0 end end for i = 1, tot - 1 do local ti = i local cnt = 0 for j = 1, n do if ti % 2 == 1 then cnt = cnt + 1 ti = ti - 1 end ti = ti / 2 end table.insert(stagetask[cnt], i) end -- set first state local tmp = 1 for i = 1, n do alltask[i][tmp] = 0 tmp = tmp * 2 end return tot, alltask, stagetask end local function heldkarp_doall(n, alltask, stagetask, cost) for stage = 1, n - 1 do local stlen = #stagetask[stage] for i_stagetask = 1, stlen do local used = stagetask[stage][i_stagetask] local t_used = used for i = 1, n do if t_used % 2 == 1 then local val = alltask[i][used] local mul = 1 local tmp = used for j = 1, n do if tmp % 2 == 0 then if cost[i][j] then alltask[j][used + mul] = mma(alltask[j][used + mul], val + cost[i][j]) else alltask[i][used + mul] = mma(alltask[i][used + mul], val) end else tmp = tmp - 1 end tmp = tmp / 2 mul = mul * 2 end t_used = t_used - 1 end t_used = t_used / 2 end end end end local function heldkarp_getresult(n, tot, alltask) local ret = 0 for i = 1, n do ret = mma(ret, alltask[i][tot - 1]) end return ret end local n, m = io.read("*n", "*n") local cost = {} for i = 1, n do cost[i] = {} end for i = 1, m do local a, b, c = io.read("*n", "*n", "*n") cost[a][b] = c cost[b][a] = c end local tot, alltask, stagetask = heldkarp_prepare(n) heldkarp_doall(n, alltask, stagetask, cost) print(heldkarp_getresult(n, tot, alltask))