luogu#P8283. 「MCOI-08」Dantalion

    ID: 12278 远端评测题 1370ms 256MiB 尝试: 0 已通过: 0 难度: 7 上传者: 标签>洛谷原创O2优化线性基洛谷月赛

「MCOI-08」Dantalion

题目背景

And thus it is Tairitsu's turn to gain the upper hand.

题目描述

给定一个长为 nn1n6×1051\le n\le 6\times 10^5)的非负整数序列 a0,a1,,an1a_0,a_1,\dots,a_{n-1}0ai<2300\le a_i<2^{30})。

qq 个问询(1q1061\le q\le 10^6)。

每次问询两个整数 l,rl,r0lr<n0\le l\le r<n),有多少对整数 x,yx,y 满足:

  • lxyrl\le x\le y\le r
  • i,jS :ijS\forall i,j\in S\ :i\oplus j\in S,其中 S:={ak}k=xyS:=\{a_k\}_{k=x}^y

Tip: 本题总时限较大,故请减少无意义提交量(如高复杂度暴力或是直接提交所给尚需完善的代码等)。

输入格式

由于本题数据较多,您不需要输入输出,请完善以下程序中的 init(int, int, vector<int>)solve(int, int) 函数,并提交。正解不依赖于其模板。

#include <bits/stdc++.h>
using namespace std;

void init(int n, int q, vector<int> a) {
  // implement...
}

long long solve(int l, int r) {
  // implement...
}

int main() {
  int n, q;
  uint64_t s;
  cin >> n >> q >> s;
  string r;
  cin >> r;
  vector<int> a(n);
  for (int i = 0; i < n; i++)
    for (int s = 5 * i; s < 5 * i + 5; s++)
      a[i] = (a[i] * 64 + (int)(r[s]) - (int)('0'));
  init(n, q, a);
  uint64_t state = 0;
  auto splitmix64 = [&](uint64_t v) {
    uint64_t z = (v + 0x9e3779b97f4a7c15);
    z = (z ^ (z >> 30)) * 0xbf58476d1ce4e5b9;
    z = (z ^ (z >> 27)) * 0x94d049bb133111eb;
    return z ^ (z >> 31);
  };
  mt19937_64 rng(s);
  for (int i = 0; i < q; i++) {
    int l = (rng() ^ state) % n;
    int r = (rng() ^ state) % n;
    long long ans = solve(min(l, r), max(l, r));
    state = splitmix64(state + ans);
    if ((i + 1) % (1 << 15) == 0)
      cout << state << endl;
  }
  cout << state << endl;
}
5 10 2
0000000001000020000300004
4834712607666044912
20 100 16500242824326557842
0000500006000070000800000000010000200003000040000000001000020000300004000090000:0000;0000<0000=0000>
5449866856465492064

提示

数据规模与约定

对于 100%100\% 的数据,1n6×105,1q1061\leq n\le 6\times 10^5,1\le q\leq 10^60ai<2300 \le a_i < 2^{30}0lr<n0 \le l \le r < n

对于 100%100\% 的数据,输入合法。

  • Subtask 1(5 pts,Tutorial):1n,q1021\le n,q\le 10^2
  • Subtask 2(7 pts,Tutorial):1n,q1031\leq n,q\leq 10^3
  • Subtask 3(11 pts,PST 5.0):1n,q1041\leq n,q\leq 10^4
  • Subtask 4(17 pts,PRS 8.2):1n,q1051\leq n,q\leq 10^5
  • Subtask 5(61 pts,FTR 10.9):1n6×105,1q1061\leq n\le 6\times 10^5,1\le q\leq 10^6

为什么要多个 11 分呢,因为谱师打本曲时性了 11 Lost.

Idea: Powerless; Solution: ccz181078&noip&w33z; Code: w33z; Data: w33z

This problem was added on 2022.4.10. Thanks for their help.

The data was strengthened on 2022.4.27 by w33z.

2022.4.10 - 2022.5.4 : 25 days 1st kill (水军带你飞).

2022.4.10 - 2022.5.17 : 38 days 2nd kill (WhisperingSnowflakes).

2022.4.10 - 2022.6.9 : 61 days 3rd kill (Verdandi).