Submission #850108

#	Time	Username	Problem	Language	Result	Execution time	Memory
850108		c2zi6	Longest beautiful sequence (IZhO17_subsequence)	C++14	23 / 100	66 ms	1880 KiB

subsequence

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;

int n;
vector<int> a;
vector<int> k;

void solution12() {
    vector<int> dp(n);
    vector<int> prev(n);
    int globans = 0;
    for (int i = 0; i < n; i++) {
        dp[i] = 1;
        prev[i] = i;
        for (int j = 0; j < i; j++) {
            if (__builtin_popcount(a[i] & a[j]) == k[i]) {
                if (dp[j]+1 > dp[i]) {
                    dp[i] = dp[j]+1;
                    prev[i] = j;
                }
            }
        }

        if (dp[i] > dp[globans]) globans = i;
    }

    cout << dp[globans] << endl;
    int x = globans;
    vector<int> ans;
    while (true) {
        ans.push_back(x+1);
        if (x == prev[x]) break;
        x = prev[x];
    }
    reverse(ans.begin(), ans.end());
    for (int x : ans) cout << x << " ";
    cout << endl;

}

void solution3() {
    vector<int> dp(n);
    vector<int> prev(n);
    int globans = 0;
    vector<int> maxfor(1<<8, -1);
    for (int i = 0; i < n; i++) {
        dp[i] = 1;
        prev[i] = i;
        for (int s = 0; s < a[i]; s++) {
            if (maxfor[s] == -1) continue;
            if (__builtin_popcount(a[i] & s) == k[i]) {
                int j = maxfor[s];
                if (dp[j]+1 > dp[i]) {
                    dp[i] = dp[j]+1;
                    prev[i] = j;
                }
            }
        }
        if (maxfor[a[i]] == -1 || dp[i] > dp[maxfor[a[i]]]) {
            maxfor[a[i]] = i;
        }

        if (dp[i] > dp[globans]) globans = i;
    }

    cout << dp[globans] << endl;
    int x = globans;
    vector<int> ans;
    while (true) {
        ans.push_back(x+1);
        if (x == prev[x]) break;
        x = prev[x];
    }
    reverse(ans.begin(), ans.end());
    for (int x : ans) cout << x << " ";
    cout << endl;

}

void solve() {
    cin >> n;
    a = k = vector<int>(n);
    for (int& x : a) cin >> x;
    for (int& x : k) cin >> x;
    if (n <= 5000) solution12();
    else solution3();
}

int main() {
    int t = 1;
    //cin >> t;
    while (t--) solve();
}

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