Submission #1092432

#	Time	Username	Problem	Language	Result	Execution time	Memory
1092432		juicy	Longest beautiful sequence (IZhO17_subsequence)	C++17	100 / 100	2590 ms	92568 KiB

subsequence

#include <bits/stdc++.h>

using namespace std;

#ifdef LOCAL
#include "debug.h"
#else
#define debug(...) 42
#endif

const int N = 1e5 + 5;

int n;
int a[N], pr[N], cnt[1024];
array<int, 2> f[1024][1024][11];

array<int, 2> qry(int x, int y) {
  int i = x & 1023;
  array<int, 2> res{};
  for (int m = 0; m < 1024; ++m) {
    int r = y - cnt[x >> 10 & m];
    if (0 <= r && r <= 10) {
      res = max(res, f[m][i][r]);
    }
  }
  return res;
} 

void upd(int x, array<int, 2> y) {
  for (int m = 0; m < 1024; ++m) {
    f[x >> 10][m][cnt[m & x]] = max(f[x >> 10][m][cnt[m & x]], y);
  }
}

int main() {
  ios::sync_with_stdio(false); cin.tie(nullptr);

  for (int i = 0; i < 1024; ++i) {
    cnt[i] = __builtin_popcount(i);
  }
  cin >> n;
  for (int i = 1; i <= n; ++i) {
    cin >> a[i];
  }
  array<int, 2> res{};
  for (int i = 1; i <= n; ++i) {
    int k; cin >> k;
    auto x = qry(a[i], k);
    pr[i] = x[1];
    ++x[0], x[1] = i;
    res = max(res, x);
    upd(a[i], x);
  }
  cout << res[0] << "\n";
  vector<int> ans;
  for (int i = res[1]; i; i = pr[i]) {
    ans.push_back(i);
  }
  reverse(ans.begin(), ans.end());
  for (int x : ans) {
    cout << x << " ";
  }
  return 0;
}

• Subtask 1: 7 / 7
• Subtask 2: 16 / 16
• Subtask 3: 17 / 17
• Subtask 4: 60 / 60