結果
| 問題 | No.3423 Minimum Xor Query |
| コンテスト | |
| ユーザー |
 kidodesu
|
| 提出日時 | 2025-12-28 19:59:39 |
| 言語 | PyPy3 (7.3.17) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 5,980 bytes |
| 記録 | |
| コンパイル時間 | 216 ms |
| コンパイル使用メモリ | 82,564 KB |
| 実行使用メモリ | 181,220 KB |
| 最終ジャッジ日時 | 2026-01-11 13:04:15 |
| 合計ジャッジ時間 | 12,787 ms |
|
ジャッジサーバーID （参考情報） |
judge5 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| other | TLE * 1 -- * 17 |
ソースコード
# https://github.com/tatyam-prime/SortedSet/blob/main/SortedMultiset.py
import math
from bisect import bisect_left, bisect_right
class SortedMultiset:
BUCKET_RATIO = 16
SPLIT_RATIO = 24
def __init__(self, a = []):
"Make a new SortedMultiset from iterable. / O(N) if sorted / O(N log N)"
a = list(a)
n = self.size = len(a)
if any(a[i] > a[i + 1] for i in range(n - 1)):
a.sort()
num_bucket = int(math.ceil(math.sqrt(n / self.BUCKET_RATIO)))
self.a = [a[n * i // num_bucket : n * (i + 1) // num_bucket] for i in range(num_bucket)]
def __iter__(self):
for i in self.a:
for j in i: yield j
def __reversed__(self):
for i in reversed(self.a):
for j in reversed(i): yield j
def __eq__(self, other) -> bool:
return list(self) == list(other)
def __len__(self) -> int:
return self.size
def __repr__(self) -> str:
return "SortedMultiset" + str(self.a)
def __str__(self) -> str:
s = str(list(self))
return "{" + s[1 : len(s) - 1] + "}"
def _position(self, x):
"return the bucket, index of the bucket and position in which x should be. self must not be empty."
for i, a in enumerate(self.a):
if x <= a[-1]: break
return (a, i, bisect_left(a, x))
def __contains__(self, x) -> bool:
if self.size == 0: return False
a, _, i = self._position(x)
return i != len(a) and a[i] == x
def count(self, x) -> int:
"Count the number of x."
return self.index_right(x) - self.index(x)
def add(self, x) -> None:
"Add an element. / O(√N)"
if self.size == 0:
self.a = [[x]]
self.size = 1
return
a, b, i = self._position(x)
a.insert(i, x)
self.size += 1
if len(a) > len(self.a) * self.SPLIT_RATIO:
mid = len(a) >> 1
self.a[b:b+1] = [a[:mid], a[mid:]]
def _pop(self, a, b: int, i: int):
ans = a.pop(i)
self.size -= 1
if not a: del self.a[b]
return ans
def discard(self, x) -> bool:
"Remove an element and return True if removed. / O(√N)"
if self.size == 0: return False
a, b, i = self._position(x)
if i == len(a) or a[i] != x: return False
self._pop(a, b, i)
return True
def lt(self, x):
"Find the largest element < x, or None if it doesn't exist."
for a in reversed(self.a):
if a[0] < x:
return a[bisect_left(a, x) - 1]
def le(self, x):
"Find the largest element <= x, or None if it doesn't exist."
for a in reversed(self.a):
if a[0] <= x:
return a[bisect_right(a, x) - 1]
def gt(self, x):
"Find the smallest element > x, or None if it doesn't exist."
for a in self.a:
if a[-1] > x:
return a[bisect_right(a, x)]
def ge(self, x):
"Find the smallest element >= x, or None if it doesn't exist."
for a in self.a:
if a[-1] >= x:
return a[bisect_left(a, x)]
def __getitem__(self, i: int):
"Return the i-th element."
if i < 0:
for a in reversed(self.a):
i += len(a)
if i >= 0: return a[i]
else:
for a in self.a:
if i < len(a): return a[i]
i -= len(a)
raise IndexError
def pop(self, i: int = -1):
"Pop and return the i-th element."
if i < 0:
for b, a in enumerate(reversed(self.a)):
i += len(a)
if i >= 0: return self._pop(a, ~b, i)
else:
for b, a in enumerate(self.a):
if i < len(a): return self._pop(a, b, i)
i -= len(a)
raise IndexError
def index(self, x) -> int:
"Count the number of elements < x."
ans = 0
for a in self.a:
if a[-1] >= x:
return ans + bisect_left(a, x)
ans += len(a)
return ans
def index_right(self, x) -> int:
"Count the number of elements <= x."
ans = 0
for a in self.a:
if a[-1] > x:
return ans + bisect_right(a, x)
ans += len(a)
return ans
n, q = map(int, input().split())
A = list(map(int, input().split()))
A = [A[i] for i in range(n)]
inf = 1 << 30
N = 300
t = (n + N - 1) // N + 1
S = [(-1, inf)]
L0 = []
L1 = []
for i in range(t):
L0.append(len(S))
for a in A[:min(i*N, n)]:
S.append((i, a))
S.append((i, inf))
L0.append(len(S))
M = [(-1, inf)]
for i in range(t):
L1.append(len(M))
for j in range(L0[i], L0[i+1]-1):
M.append((i, S[j][1]^S[j+1][1]))
M.append((i, inf))
L1.append(len(M))
S = SortedMultiset(S)
M = SortedMultiset(M)
for _ in range(q):
K = list(map(int, input().split()))
if K[0] == 1:
i, x = K[1:]
i -= 1
l = i // N + 1
px = A[i]
for s in range(l, t):
idx = S.index((s, px))
M.discard((s, S[idx-1][1] ^ S[idx][1]))
M.discard((s, S[idx][1] ^ S[idx+1][1]))
S.pop(idx)
M.add((s, S[idx-1][1] ^ S[idx][1]))
S.add((s, x))
idx = S.index((s, x))
M.discard((s, S[idx-1][1] ^ S[idx+1][1]))
M.add((s, S[idx-1][1] ^ S[idx][1]))
M.add((s, S[idx][1] ^ S[idx+1][1]))
A[i] = x
else:
r = K[1]
lt = r // N
l = N * lt
B = A[l: r][:]
B.sort()
ans = M[L1[lt]][1]
for i in range(len(B)-1):
ans = min(ans, B[i]^B[i+1])
for i in range(len(B)):
idx = S.index((lt, B[i]))
ans = min(ans, S[idx-1][1]^B[i])
ans = min(ans, B[i]^S[idx][1])
print(ans)