結果
| 問題 |
No.900 aδδitivee
|
| コンテスト | |
| ユーザー |
双六
|
| 提出日時 | 2020-07-29 21:12:29 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
AC
|
| 実行時間 | 775 ms / 2,000 ms |
| コード長 | 3,976 bytes |
| コンパイル時間 | 153 ms |
| コンパイル使用メモリ | 82,564 KB |
| 実行使用メモリ | 207,736 KB |
| 最終ジャッジ日時 | 2024-06-30 04:47:36 |
| 合計ジャッジ時間 | 19,743 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge4 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 2 |
| other | AC * 27 |
ソースコード
import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict, deque
INF = float("inf")
def getlist():
return list(map(int, input().split()))
class lazySegTree(object):
# N:処理する区間の長さ
def __init__(self, N, sign):
self.N = N
self.LV = (N - 1).bit_length()
self.N0 = 2 ** self.LV
self.initVal = 0
self.data = [0] * (2 * self.N0)
self.lazy = [0] * (2 * self.N0)
self.sign = sign
# 区間クエリの種類
def calc(self, a, b):
return a + b
def initialize(self, A):
for i in range(self.N):
self.data[self.N0 - 1 + i] = A[i]
for i in range(self.N0 - 2, -1, -1):
self.data[i] = self.calc(self.data[2 * i + 1], self.data[2 * i + 2])
# 遅延伝播を行うindexを生成
def gindex(self, l, r):
L = (l + self.N0) >> 1; R = (r + self.N0) >> 1
lc = 0 if l & 1 else (L & -L).bit_length()
rc = 0 if r & 1 else (R & -R).bit_length()
for i in range(self.LV):
if rc <= i:
yield R
if L < R and lc <= i:
yield L
L >>= 1; R >>= 1
# 遅延伝搬処理
def propagates(self, *ids):
for i in reversed(ids):
v = self.lazy[i - 1]
if not v:
continue
self.lazy[2 * i - 1] += v; self.lazy[2 * i] += v
self.data[2 * i - 1] += v * self.sign[2 * i - 1];
self.data[2 * i] += v * self.sign[2 * i]
self.lazy[i - 1] = 0
# 区間[l, r]にxを加算
def update(self, l, r, x):
*ids, = self.gindex(l, r + 1)
self.propagates(*ids)
L = self.N0 + l; R = self.N0 + r + 1
while L < R:
if R & 1:
R -= 1
self.lazy[R - 1] += x; self.data[R - 1] += x * self.sign[R - 1]
if L & 1:
self.lazy[L - 1] += x; self.data[L - 1] += x * self.sign[L - 1]
L += 1
L >>= 1; R >>= 1
for i in ids:
self.data[i - 1] = self.calc(self.data[2 * i - 1], self.data[2 * i])
# 区間[l, r]内の和
def query(self, l, r):
self.propagates(*self.gindex(l, r + 1))
L = self.N0 + l; R = self.N0 + r + 1
s = self.initVal
while L < R:
if R & 1:
R -= 1
s = self.calc(s, self.data[R - 1])
if L & 1:
s = self.calc(s, self.data[L - 1])
L += 1
L >>= 1; R >>= 1
return s
class SegmentTree(object):
#N:処理する区間の長さ
def __init__(self, N):
self.N = N
self.N0 = 2 ** (N - 1).bit_length()
self.initVal = 0
self.data = [self.initVal] * (2 * self.N0)
# 区間クエリの種類
def calc(self, a, b):
return a + b
# セグメント木の中身をリストAで初期化
def initialize(self, A):
for i in range(self.N):
self.data[self.N0 - 1 + i] = A[i]
for i in range(self.N0 - 2, -1, -1):
self.data[i] = self.calc(self.data[2 * i + 1], self.data[2 * i + 2])
class Graph(object):
def __init__(self):
self.graph = defaultdict(list)
def __len__(self):
return len(self.graph)
def add_edge(self, a, b):
self.graph[a].append(b)
def Euler_tour(G, node, euler, sign):
euler.append(node)
sign.append(1)
for i in G.graph[node]:
Euler_tour(G, i, euler, sign)
euler.append(node)
sign.append(-1)
#処理内容
def main():
N = int(input())
edgeD = defaultdict(int)
# edge = []
G = Graph()
for i in range(N - 1):
u, v, w = getlist()
G.add_edge(u, v)
edgeD[v] = w
# edge.append((v, w))
euler = []
sign = []
Euler_tour(G, 0, euler, sign)
# print(euler)
# print(sign)
Seg = SegmentTree(2 * N)
Seg.initialize(sign)
Din = defaultdict(lambda:-1)
Dout = defaultdict(int)
A = [0] * (2 * N)
#DinおよびDoutの構築
for i in range(2 * N):
var = euler[i]
if Din[var] == -1:
Din[var] = i
A[i] = edgeD[var]
else:
Dout[var] = i
A[i] = -edgeD[var]
# print(A)
# signによる重みをもたせる
lSeg = lazySegTree(2 * N, Seg.data)
lSeg.initialize(A)
Q = int(input())
for i in range(Q):
query = getlist()
if query[0] == 1:
a, x = query[1], query[2]
lSeg.update(Din[a] + 1, Dout[a] - 1, x)
else:
b = query[1]
ans = lSeg.query(0, Din[b])
# print(0, Din[b])
print(ans)
if __name__ == '__main__':
main()
双六