結果
問題 | No.1103 Directed Length Sum |
ユーザー | tonnnura172 |
提出日時 | 2020-07-11 05:19:21 |
言語 | PyPy3 (7.3.15) |
結果 |
AC
|
実行時間 | 1,576 ms / 3,000 ms |
コード長 | 1,346 bytes |
コンパイル時間 | 510 ms |
コンパイル使用メモリ | 82,152 KB |
実行使用メモリ | 263,624 KB |
最終ジャッジ日時 | 2024-10-12 07:13:57 |
合計ジャッジ時間 | 15,302 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge4 |
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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 | 62 ms
65,920 KB |
testcase_01 | AC | 61 ms
65,940 KB |
testcase_02 | AC | 557 ms
263,624 KB |
testcase_03 | AC | 444 ms
262,844 KB |
testcase_04 | AC | 881 ms
183,168 KB |
testcase_05 | AC | 1,576 ms
235,848 KB |
testcase_06 | AC | 579 ms
145,280 KB |
testcase_07 | AC | 179 ms
93,440 KB |
testcase_08 | AC | 242 ms
100,428 KB |
testcase_09 | AC | 136 ms
86,072 KB |
testcase_10 | AC | 318 ms
110,772 KB |
testcase_11 | AC | 944 ms
194,164 KB |
testcase_12 | AC | 577 ms
146,304 KB |
testcase_13 | AC | 316 ms
112,640 KB |
testcase_14 | AC | 126 ms
84,224 KB |
testcase_15 | AC | 468 ms
131,328 KB |
testcase_16 | AC | 1,072 ms
207,720 KB |
testcase_17 | AC | 1,161 ms
194,972 KB |
testcase_18 | AC | 306 ms
110,464 KB |
testcase_19 | AC | 1,039 ms
195,456 KB |
testcase_20 | AC | 152 ms
88,132 KB |
testcase_21 | AC | 214 ms
99,072 KB |
testcase_22 | AC | 785 ms
161,116 KB |
testcase_23 | AC | 475 ms
135,552 KB |
ソースコード
import sys, re from collections import deque, defaultdict, Counter from math import ceil, sqrt, hypot, factorial, pi, sin, cos, radians, gcd, log2 from itertools import accumulate, permutations, combinations, product from operator import itemgetter, mul, add from copy import deepcopy from string import ascii_lowercase, ascii_uppercase, digits from bisect import bisect, bisect_left from heapq import heappush, heappop from functools import reduce, lru_cache def input(): return sys.stdin.buffer.readline()[:-1] def INT(): return int(input()) def MAP(): return map(int, input().split()) def LIST(): return list(map(int, input().split())) def ZIP(n): return zip(*(MAP() for _ in range(n))) sys.setrecursionlimit(10 ** 9) INF = float('inf') mod = 10 ** 9 + 7 N = INT() tree = [[] for _ in range(N)] din = [0]*N for _ in range(N-1): A, B = MAP() tree[A-1].append(B-1) din[B-1] += 1 root = din.index(0) size_d = [0]*N size_u = [0]*N parent = [0]*N order = [] stack = [root] while stack: x = stack.pop() size_u[x] += 1 order.append(x) for y in tree[x]: size_u[y] += size_u[x] parent[y] = x stack.append(y) ans = 0 for v in order[::-1]: size_d[v] += 1 if v == root: break p = parent[v] s = size_d[v] ans += s * size_u[p] ans %= mod size_d[p] += s print(ans)