結果
問題 | No.2677 Minmax Independent Set |
ユーザー | nikoro256 |
提出日時 | 2024-03-19 22:30:32 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 1,006 ms / 2,000 ms |
コード長 | 1,384 bytes |
コンパイル時間 | 266 ms |
コンパイル使用メモリ | 81,700 KB |
実行使用メモリ | 136,572 KB |
最終ジャッジ日時 | 2024-03-19 22:31:05 |
合計ジャッジ時間 | 32,408 ms |
ジャッジサーバーID (参考情報) |
judge15 / judge12 |
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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 | 68 ms
55,600 KB |
testcase_01 | AC | 41 ms
55,600 KB |
testcase_02 | AC | 42 ms
55,600 KB |
testcase_03 | AC | 41 ms
55,600 KB |
testcase_04 | AC | 41 ms
55,600 KB |
testcase_05 | AC | 858 ms
127,208 KB |
testcase_06 | AC | 890 ms
127,200 KB |
testcase_07 | AC | 858 ms
127,328 KB |
testcase_08 | AC | 843 ms
127,200 KB |
testcase_09 | AC | 830 ms
127,332 KB |
testcase_10 | AC | 831 ms
134,080 KB |
testcase_11 | AC | 820 ms
134,076 KB |
testcase_12 | AC | 621 ms
128,596 KB |
testcase_13 | AC | 931 ms
132,416 KB |
testcase_14 | AC | 894 ms
135,652 KB |
testcase_15 | AC | 889 ms
133,588 KB |
testcase_16 | AC | 1,006 ms
127,532 KB |
testcase_17 | AC | 1,005 ms
127,532 KB |
testcase_18 | AC | 622 ms
109,168 KB |
testcase_19 | AC | 719 ms
115,500 KB |
testcase_20 | AC | 289 ms
91,144 KB |
testcase_21 | AC | 824 ms
119,308 KB |
testcase_22 | AC | 141 ms
80,464 KB |
testcase_23 | AC | 54 ms
67,744 KB |
testcase_24 | AC | 46 ms
61,004 KB |
testcase_25 | AC | 44 ms
61,024 KB |
testcase_26 | AC | 46 ms
61,004 KB |
testcase_27 | AC | 53 ms
67,744 KB |
testcase_28 | AC | 776 ms
136,572 KB |
testcase_29 | AC | 838 ms
128,632 KB |
testcase_30 | AC | 40 ms
55,600 KB |
testcase_31 | AC | 40 ms
55,600 KB |
testcase_32 | AC | 41 ms
55,600 KB |
testcase_33 | AC | 41 ms
55,600 KB |
testcase_34 | AC | 42 ms
55,600 KB |
testcase_35 | AC | 44 ms
61,024 KB |
testcase_36 | AC | 46 ms
61,004 KB |
testcase_37 | AC | 50 ms
65,688 KB |
testcase_38 | AC | 55 ms
69,792 KB |
testcase_39 | AC | 95 ms
77,628 KB |
testcase_40 | AC | 107 ms
78,116 KB |
testcase_41 | AC | 115 ms
78,628 KB |
testcase_42 | AC | 128 ms
79,824 KB |
testcase_43 | AC | 185 ms
84,116 KB |
testcase_44 | AC | 266 ms
90,184 KB |
testcase_45 | AC | 443 ms
102,512 KB |
testcase_46 | AC | 875 ms
126,596 KB |
testcase_47 | AC | 948 ms
127,584 KB |
testcase_48 | AC | 952 ms
127,840 KB |
testcase_49 | AC | 940 ms
127,496 KB |
testcase_50 | AC | 318 ms
98,180 KB |
testcase_51 | AC | 97 ms
78,204 KB |
testcase_52 | AC | 637 ms
125,812 KB |
testcase_53 | AC | 588 ms
120,484 KB |
testcase_54 | AC | 96 ms
77,964 KB |
testcase_55 | AC | 830 ms
135,320 KB |
testcase_56 | AC | 793 ms
134,360 KB |
testcase_57 | AC | 816 ms
134,492 KB |
testcase_58 | AC | 851 ms
135,456 KB |
testcase_59 | AC | 825 ms
134,796 KB |
testcase_60 | AC | 482 ms
129,176 KB |
testcase_61 | AC | 470 ms
126,172 KB |
testcase_62 | AC | 503 ms
127,164 KB |
testcase_63 | AC | 470 ms
129,052 KB |
ソースコード
# 全方位木DP # https://qiita.com/Kiri8128/items/a011c90d25911bdb3ed3#bottom-up-%E9%83%A8%E5%88%86 import sys input = sys.stdin.readline from collections import deque N=int(input()) mod=998244353 X = [[] for i in range(N)] for i in range(N-1): x, y = map(int, input().split()) X[x-1].append(y-1) X[y-1].append(x-1) P = [-1] * N Q = deque([0]) R = [] while Q: i = deque.popleft(Q) R.append(i) for a in X[i]: if a != P[i]: P[a] = i X[a].remove(i) deque.append(Q, a) ##### Settings unit = (0,0) merge = lambda a, b: (max(a)+max(b),a[1]+b[1]) adj_bu = lambda a, i: (a[1]+1,a[0]) adj_td = lambda a, i, p: (a[1]+1,a[0]) adj_fin = lambda a, i: (a[1]+1,a[0]) ##### ME = [unit] * N XX = [0] * N TD = [unit] * N for i in R[1:][::-1]: XX[i] = adj_bu(ME[i], i) p = P[i] ME[p] = merge(ME[p], XX[i]) XX[R[0]] = adj_fin(ME[R[0]], R[0]) # print("ME =", ME) # Merge before adj # print("XX =", XX) # Bottom-up after adj for i in R: ac = TD[i] for j in X[i]: TD[j] = ac ac = merge(ac, XX[j]) ac = unit for j in X[i][::-1]: TD[j] = adj_td(merge(TD[j], ac), j, i) ac = merge(ac, XX[j]) XX[j] = adj_fin(merge(ME[j], TD[j]), j) # print("TD =", TD) # Top-down after adj # print("XX =", XX) # Final Result #print(*XX, sep = "\n") print(min([x[0] for x in XX]))