結果
問題 | No.1227 I hate ThREE |
ユーザー | WSKR |
提出日時 | 2020-09-22 00:51:35 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 537 ms / 2,000 ms |
コード長 | 3,462 bytes |
コンパイル時間 | 251 ms |
コンパイル使用メモリ | 82,432 KB |
実行使用メモリ | 124,416 KB |
最終ジャッジ日時 | 2024-06-25 00:17:41 |
合計ジャッジ時間 | 10,930 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
(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 | 43 ms
54,272 KB |
testcase_01 | AC | 43 ms
54,144 KB |
testcase_02 | AC | 44 ms
54,400 KB |
testcase_03 | AC | 94 ms
78,080 KB |
testcase_04 | AC | 96 ms
77,824 KB |
testcase_05 | AC | 102 ms
79,616 KB |
testcase_06 | AC | 41 ms
54,272 KB |
testcase_07 | AC | 42 ms
54,144 KB |
testcase_08 | AC | 126 ms
82,304 KB |
testcase_09 | AC | 116 ms
81,380 KB |
testcase_10 | AC | 97 ms
78,976 KB |
testcase_11 | AC | 479 ms
119,712 KB |
testcase_12 | AC | 532 ms
124,032 KB |
testcase_13 | AC | 75 ms
76,544 KB |
testcase_14 | AC | 114 ms
80,512 KB |
testcase_15 | AC | 131 ms
83,328 KB |
testcase_16 | AC | 230 ms
94,080 KB |
testcase_17 | AC | 161 ms
86,400 KB |
testcase_18 | AC | 282 ms
102,016 KB |
testcase_19 | AC | 235 ms
95,744 KB |
testcase_20 | AC | 299 ms
104,140 KB |
testcase_21 | AC | 60 ms
68,352 KB |
testcase_22 | AC | 243 ms
96,796 KB |
testcase_23 | AC | 512 ms
122,496 KB |
testcase_24 | AC | 537 ms
124,380 KB |
testcase_25 | AC | 529 ms
124,416 KB |
testcase_26 | AC | 418 ms
119,924 KB |
testcase_27 | AC | 457 ms
122,240 KB |
testcase_28 | AC | 473 ms
123,648 KB |
testcase_29 | AC | 454 ms
123,520 KB |
testcase_30 | AC | 432 ms
120,960 KB |
testcase_31 | AC | 443 ms
120,576 KB |
testcase_32 | AC | 468 ms
123,388 KB |
testcase_33 | AC | 434 ms
120,536 KB |
testcase_34 | AC | 439 ms
121,908 KB |
testcase_35 | AC | 430 ms
119,680 KB |
ソースコード
#i hate three from collections import deque mod = 10**9 + 7 def main(): N, C = map(int, input().split()) G = [[] for i in range(N+1)] for i in range(N-1): a, b = map(int, input().split()) G[a].append(b) G[b].append(a) visited = [False for i in range(N+1)] depth = [0 for i in range(N+1)] child_cnt = [1 for i in range(N+1)] que = deque([]) def dfs(s_node): visited[s_node] = True for child in G[s_node]: if visited[child] == False: depth[child] = depth[s_node] + 1 dfs(child) for child in G[s_node]: if depth[child] > depth[s_node]: child_cnt[s_node] += child_cnt[child] que.append(s_node) dfs(1) if C > 9*N: dp = [[0 for i in range(6*N-5)] for i in range(N+1)] while que: node = que.popleft() for i in range(3*N-3): has_child = False v = 1 for child in G[node]: if depth[child] > depth[node]: tmp_u = 0 has_child = True if i >= 3: tmp_u += dp[child][i-3] if i+3 <= 3*N-4: tmp_u += dp[child][i+3] elif i+3 > 3*N-4: tmp_u += pow(2, child_cnt[child]-1, mod) v *= tmp_u v %= mod dp[node][i] = v if has_child == False: dp[node][i] = 1 for i in range(3*N-2, 6*N-5): has_child = False v = 1 for child in G[node]: if depth[child] > depth[node]: tmp_u = 0 has_child = True if i+3 <= 6*N-6: tmp_u += dp[child][i+3] if i-3 >= 3*N-2: tmp_u += dp[child][i-3] else: tmp_u += pow(2, child_cnt[child]-1, mod) v *= tmp_u v %= mod dp[node][i] = v if has_child == False: dp[node][i] = 1 ans = sum(dp[1][i] for i in range(3*N-3)) + sum(dp[1][i] for i in range(3*N-2, 6*N-5)) + (C-6*N + 6)*pow(2, N-1, mod) print(ans % mod) return elif C <= 9*N: dp = [[0 for i in range(C+1)] for j in range(N+1)] while que: node = que.popleft() for i in range(1, C+1): has_child = False v = 1 for child in G[node]: if depth[child] > depth[node]: has_child = True tmp_u = 0 if 1 <= i-3 <= C: tmp_u += dp[child][i-3] if 1 <= i+3 <= C: tmp_u += dp[child][i+3] v *= (tmp_u) v %= mod dp[node][i] = v % mod if has_child == False: dp[node][i] = 1 ans = sum(dp[1][i] for i in range(1, C+1)) % mod print(ans) return if __name__ == "__main__": main()