結果
| 問題 |
No.1240 Or Sum of Xor Pair
|
| コンテスト | |
| ユーザー |
tamato
|
| 提出日時 | 2020-09-25 23:19:29 |
| 言語 | PyPy3 (7.3.15) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 3,744 bytes |
| コンパイル時間 | 191 ms |
| コンパイル使用メモリ | 82,352 KB |
| 実行使用メモリ | 283,128 KB |
| 最終ジャッジ日時 | 2024-06-28 07:24:59 |
| 合計ジャッジ時間 | 10,064 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 12 TLE * 1 -- * 17 |
ソースコード
mod = 1000000007
eps = 10**-9
def main():
import sys
from collections import Counter
input = sys.stdin.readline
def plus(a, b):
return a+b
def f(A, B):
return [a + b for a, b in zip(A, B)]
ident = (0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)
class SegmentTree:
def __init__(self, A, initialize=True, segfunc=f, ident=ident):
self.N = len(A)
self.LV = (self.N - 1).bit_length()
self.N0 = 1 << self.LV
self.segfunc = segfunc
self.ident = ident
if initialize:
self.data = [self.ident] * self.N0 + A + [self.ident] * (self.N0 - self.N)
for i in range(self.N0 - 1, 0, -1):
self.data[i] = segfunc(self.data[i * 2], self.data[i * 2 + 1])
else:
self.data = [self.ident] * (self.N0 * 2)
def update(self, i, x):
i += self.N0 - 1
self.data[i] = x
for _ in range(self.LV):
i >>= 1
self.data[i] = self.segfunc(self.data[i * 2], self.data[i * 2 + 1])
# open interval [l, r)
def query(self, l, r):
l += self.N0 - 1
r += self.N0 - 1
ret_l = self.ident
ret_r = self.ident
while l < r:
if l & 1:
ret_l = self.segfunc(ret_l, self.data[l])
l += 1
if r & 1:
ret_r = self.segfunc(self.data[r - 1], ret_r)
r -= 1
l >>= 1
r >>= 1
return self.segfunc(ret_l, ret_r)
# return smallest i(l <= i < r) s.t. check(A[i]) == True
def binsearch(self, l, r, check):
if not check(self.query(l, r)):
return r
l += self.N0 - 1
val = self.ident
while True:
if check(self.segfunc(val, self.data[l])):
break
if l & 1:
val = self.segfunc(val, self.data[l])
l += 1
l >>= 1
while l < self.N0:
newval = self.segfunc(val, self.data[l * 2])
if not check(newval):
val = newval
l = (l << 1) + 1
else:
l <<= 1
return l - self.N0 + 1
N, X = map(int, input().split())
A = list(map(int, input().split()))
NN = 2**18
ST = SegmentTree([ident for _ in range(NN)], initialize=False)
ST_cnt = SegmentTree([0] * NN, initialize=False, segfunc=plus, ident=0)
C = Counter(A)
for a in C:
tmp = [0] * 18
for i in range(18):
tmp[i] = (1 - (a >> i & 1)) * C[a]
ST.update(a+1, tuple(tmp))
ST_cnt.update(a+1, C[a])
ans = 0
if X == 2**18:
assert False
for a in A:
zero_bit = []
for i in range(18):
if not a >> i & 1:
zero_bit.append(i)
current_node = 1
for i in range(17, -1, -1):
x = X >> i & 1
aa = a >> i & 1
if x == 1:
y = aa
small_node = current_node * 2 + y
ans += (NN-1) * ST_cnt.data[small_node]
num = ST.data[small_node]
for j in zero_bit:
ans -= (1 << j) * num[j]
current_node = current_node * 2 + (1 - y)
else:
current_node = current_node * 2 + aa
#if a == 1:
# print(ST.data[current_node])
ans -= a
#print(a, ans)
print(ans // 2)
if __name__ == '__main__':
main()
tamato