Submission #1109755

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109755		Kirill22	Longest beautiful sequence (IZhO17_subsequence)	C++17	0 / 100	10 ms	49744 KiB

subsequence

#include "bits/stdc++.h"

using namespace std;

//long long C(int n, int k) {
//    long long res = 1;
//    for (int i = 1; i <= n; i++) {
//        res *= (n - i + 1);
//        res /= i;
//    }
//    return res;
//}

const int N = 1 << 20, M = 1 << 10;
int cnt[N], dp[N], pr[N], mx[N], a[N], k[N], n;
//set<pair<int, int>> life[21];
int mitm[M][M][11];

void solve() {
    for (int i = 1; i < N; i++) {
        cnt[i] = cnt[i / 2] + (i % 2);
    }
    for (int i = 0; i < M; i++) {
        for (int j = 0; j < M; j++) {
            fill(mitm[i][j], mitm[i][j] + 11, -1);
        }
    }
    cin >> n;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    for (int i = 0; i < n; i++) {
        cin >> k[i];
    }
    for (int i = 0; i < n; i++) {
        int x = a[i];
        dp[i] = 1, pr[i] = i;
        for (int msk = 0; msk < (1 << 10); msk++) {
            int need = k[i] - cnt[msk & (x >> 10)];
            if (need < 0 || need > 10) {
                continue;
            }
            int& j = mitm[msk][x % 1024][need];
            if (j != -1 && dp[i] < dp[j] + 1) {
                dp[i] = dp[j] + 1;
                pr[i] = j;
            }
        }
        for (int msk = 0; msk < (1 << 10); msk++) {
            int need = cnt[msk & (x % 1024)];
            int& j = mitm[x >> 10][msk][need];
            if (j == -1 || dp[j] < dp[i]) {
                j = i;
            }
        }
    }
    pair<int, int> res = {1, 0};
    for (int i = 0; i < n; i++) {
        res = max(res, {dp[i], i});
    }
    cout << res.first << '\n';
    vector<int> ans = {res.second};
    while (pr[res.second] != res.second) {
        res.second = pr[res.second];
        ans.push_back(res.second);
    }
    std::reverse(ans.begin(), ans.end());
    for (auto& i : ans) {
        cout << i + 1 << " ";
    }
    cout << '\n';
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    freopen("subsequence.in", "r", stdin);
    freopen("subsequence.out", "w", stdout);
    int t = 1;
//    cin >> t;
    while (t--) {
        solve();
    }
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:78:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   78 |     freopen("subsequence.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:79:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   79 |     freopen("subsequence.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 16
• Subtask 3: 0 / 17
• Subtask 4: 0 / 60