Submission #541112

#	Time	Username	Problem	Language	Result	Execution time	Memory
541112		Bunny_man	Longest beautiful sequence (IZhO17_subsequence)	C++17	7 / 100	8 ms	468 KiB

subsequence

#include <bits/stdc++.h>

#define ll long long int
#define pb push_back
#define ui unsigned int
#define ld long double
#define buster ios_base::sync_with_stdio(NULL);cin.tie(0);cout.tie(0);

using namespace std;

vector<ll> ans;
ll a[101];
ll b[101];

ll bitcount(ll k)
{
    ll cnt = 0;

    while(k)
    {
      cnt += k&1;
      k >>= 1;
    }
    return cnt;
}

int main()
{

    buster;

    ll tt = 1;

    //cin >> tt;

    while(tt--)
    {
        ll n;

        cin >> n;

        for(ll i = 1; i <= n; i++)
        {
            cin >> a[ i ];
        }
        for(ll i = 1; i <= n; i++)
        {
            cin >> b[ i ];
        }
        for(ll mask = 1; mask < (1 << n); mask++)
        {
            vector <ll> cur;
            for(ll i = 0; i < n; i++)
            {
                if(mask & (1 << i))
                {
                    cur.pb(i + 1);
                }
            }
            bool flag = 0;
            for(ll i = 0; i < cur.size(); i++)
            {
                for(ll j = i + 1; j < cur.size(); j++)
                {
                    if(bitcount(a[ cur[ i ] ] & a[ cur[ j ] ]) != b[ cur[ j ] ])
                    {
                        flag = 1;
                        break;
                    }
                }
                if(flag)
                {
                    break;
                }
            }
            if(flag)
            {
                continue;
            }
            if(cur.size() > ans.size())
            {
                ans = cur;
            }
        }
        cout << ans.size() << "\n";

        for(auto it : ans)
        {
            cout << it << ' ';
        }
    }   
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:61:29: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |             for(ll i = 0; i < cur.size(); i++)
      |                           ~~^~~~~~~~~~~~
subsequence.cpp:63:37: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |                 for(ll j = i + 1; j < cur.size(); j++)
      |                                   ~~^~~~~~~~~~~~

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