結果
問題 | No.572 妖精の演奏 |
ユーザー | siman |
提出日時 | 2022-11-24 18:49:37 |
言語 | Ruby (3.3.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 1,862 bytes |
コンパイル時間 | 97 ms |
コンパイル使用メモリ | 7,552 KB |
実行使用メモリ | 13,568 KB |
最終ジャッジ日時 | 2024-10-01 08:21:17 |
合計ジャッジ時間 | 5,061 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
(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 | 114 ms
12,288 KB |
testcase_01 | AC | 87 ms
12,416 KB |
testcase_02 | AC | 78 ms
12,288 KB |
testcase_03 | AC | 78 ms
12,160 KB |
testcase_04 | AC | 76 ms
12,160 KB |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | AC | 103 ms
12,160 KB |
testcase_08 | AC | 126 ms
12,032 KB |
testcase_09 | AC | 133 ms
12,416 KB |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | AC | 349 ms
12,928 KB |
testcase_15 | AC | 460 ms
13,440 KB |
testcase_16 | AC | 361 ms
13,056 KB |
testcase_17 | AC | 562 ms
13,568 KB |
testcase_18 | AC | 102 ms
12,288 KB |
testcase_19 | AC | 75 ms
12,288 KB |
コンパイルメッセージ
Main.rb:91: warning: assigned but unused variable - np Main.rb:56: warning: assigned but unused variable - start_pos Syntax OK
ソースコード
N = gets.to_i M = gets.to_i A = M.times.map { gets.split.map(&:to_i) } def f(start_pos, len = M) dp = Array.new(len + 1) { Array.new(M, 0) } len.times do |i| M.times do |from| next if i == 0 && start_pos != from a = dp[i][from] M.times do |to| na = a + A[from][to] if dp[i + 1][to] < na dp[i + 1][to] = na end end end end max_a = -1 best_i = -1 dp[len].each_with_index do |a, i| if max_a < a max_a = a best_i = i end end [best_i, max_a] end def find_first_step max_a = -1 first_step = -1 M.times do |i| _, a = f(i, M - 1) if max_a < a max_a = a first_step = i end end first_step end remain = N - 1 cur_pos = find_first_step start_pos = cur_pos pos = cur_pos graph = Hash.new M.times do next_pos, cost = f(pos, M) graph[pos] = [next_pos, cost] pos = next_pos end if remain > M * M visited = Hash.new(false) positions = [] loop_cost = 0 while !visited[cur_pos] positions << cur_pos visited[cur_pos] = true cur_pos, _ = graph[cur_pos] end ans = 0 rindex = positions.rindex(cur_pos) head, main = positions[0...rindex], positions[rindex..] head.each_cons(2) do |from, to| _, cost = graph[from] ans += cost remain -= M end # pp [:remain, remain] loop_cost = 0 main.each do |from| np, cost = graph[from] loop_cost += cost end loop_size = main.size loop_cnt = remain / (M * loop_size) remain -= M * loop_cnt * loop_size # pp [:remain, remain, :loop_size, loop_size, :loop_cnt, loop_cnt, :loop_cost, loop_cost] ans += loop_cnt * loop_cost cur_pos = main[0] _, last_cost = f(cur_pos, remain) ans += last_cost puts ans else max_a = -1 M.times do |i| _, a = f(i, N - 1) max_a = a if max_a < a end puts max_a end