Submission #1128030

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128030		_Temirhan	Longest beautiful sequence (IZhO17_subsequence)	C++20	0 / 100	316 ms	327680 KiB

subsequence

#include <bits/stdc++.h>

using namespace std;
  
#define int long long
#define pb push_back
#define sz(x) x.size()
#define F first
#define S second
#define nl '\n'

void Tima() 
{
    #ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
    #endif
}  

const int N = 3e5 + 1;
const int inf = 1e12;
const int mod = 998244353;

signed main() 
{
    Tima();
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >>n;
    int a[n + 1], k[n + 1];
    vector< int >good[n + 1];
    for( int i = 1; i <= n; ++i )
        cin >>a[i];
    for( int i = 1; i <= n; ++i )
    {
        cin >>k[i];
        for( int j = 1; j < i; ++j )
            if( __builtin_popcount(a[j] & a[i]) == k[i] )
                good[i].pb( j );
    }
    vector< bool >us(n + 1, false);
    int mx = 1, p = 1;
    for( int i = n; i >= 1; --i )
    {
        if( us[i] )
            continue;
        int r = i, cnt = 1;
        us[i] = true;
        while( sz(good[r]) )
        {
            ++cnt;
            r = good[r][sz(good[r]) - 1];
            us[r] = true;
        }
        if( cnt > mx )
        {
            mx = cnt;
            p = i;
        }
    }
    vector< int >ans;
    ans.pb( p );
    while( sz(good[p]) )
    {
        p = good[p][sz(good[p]) - 1];
        ans.pb( p );
    }
    reverse(ans.begin(), ans.end());
    cout <<mx <<nl;
    for( int i: ans )
        cout <<i <<' ';
}

Compilation message (stderr)

subsequence.cpp: In function 'void Tima()':
subsequence.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen("input.txt", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen("output.txt", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

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