Submission #234781

#	Time	Username	Problem	Language	Result	Execution time	Memory
234781		muhammad_hokimiyon	Longest beautiful sequence (IZhO17_subsequence)	C++14	7 / 100	47 ms	504 KiB

subsequence

#include <bits/stdc++.h>

//#pragma GCC optimize("Ofast")

#define fi first
#define se second
#define ll long long
#define dl double long

using namespace std;

const int NN = 2e6 + 7;
const int N = 1e5 + 7;
const int M = 22;
const int mod = 998244353;
const ll inf = 1e18 + 7;
const dl rf = 1e-14;
const int B = sqrt(N);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n;
int a[N];
int k[N];
pair < int , int > d[(1 << 8)];
int p[(1 << 8)];

void solve1()
{
    cin >> n;
    for( int i = 1; i <= n; i++ ){
        cin >> a[i];
    }
    for( int i = 1; i <= n; i++ ){
        cin >> k[i];
    }
    if( n <= 5000 ){
        int mx = 1;
        for( int i = 1; i <= n; i++ ){
            d[i].se = -1;
            d[i].fi = 1;
            for( int j = 1; j < i; j++ ){
                if( d[j].fi + 1 > d[i].fi && __builtin_popcount(a[j] & a[i]) == k[i] ){
                    d[i].fi = d[j].fi + 1;
                    mx = max( mx , d[i].fi );
                    d[i].se = j;
                }
            }
        }
        int p = n;
        for( int i = 1; i <= n; i++ ){
            if( d[i].fi == mx )p = i;
        }
        vector < int > ans;
        while( p != -1 ){
            ans.push_back(p);
            p = d[p].se;
        }
        reverse( ans.begin() , ans.end() );
        cout << mx << "\n";
        for( auto x : ans ){
            cout << x << " ";
        }
        return;
    }
    pair < int , int > ans = {0 , 0};
    for( int i = 1; i <= n; i++ ){
        int mx = -1;
        for( int j = 0; j < (1 << 8); j++ ){
            if( __builtin_popcount( (a[i] & j) ) == k[i] ){
                if( mx == -1 || d[j].fi + 1 > d[mx].fi ){
                    mx = j;
                }
            }
        }
        if( mx != -1 ){
            if( d[a[i]].fi < d[mx].fi + 1 ){
                p[i] = d[mx].se;
                d[a[i]] = { d[mx].fi + 1 , i };
            }
        }else d[a[i]] = {1 , i};
        if( d[a[i]].fi > ans.fi ){
            ans = d[a[i]];
        }
    }
    cout << ans.fi << "\n";
    vector < int > v;
    while( ans.se != 0 ){
        v.push_back(ans.se);
        ans.se = p[ans.se];
    }
    reverse( v.begin() , v.end() );
    for( auto x : v )cout << x << " ";
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    //freopen( "input.txt" , "r" , stdin );
    //freopen( "output.txt" , "w" , stdout );

    int cghf = 1;//cin >> cghf;
    while( cghf-- ){
        solve1();
    }
}

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