Submission #883542

#	Time	Username	Problem	Language	Result	Execution time	Memory
883542		skywwla	Longest beautiful sequence (IZhO17_subsequence)	C++17	0 / 100	1 ms	348 KiB

subsequence

#include <bits/stdc++.h>

using namespace std ;
using ll = long long ;

int32_t main() {
    ios::sync_with_stdio(false) ;
    cin.tie(nullptr) ;
    int n ; cin >> n ;
    vector<int> a(n), k(n) ;
    for (int i = 0 ; i < n ; i++) cin >> a[i] ;
    for (int i = 0 ; i < n ; i++) cin >> k[i] ;
    vector<ll> dp(n, 1) , pr(n, -1) ;
    set<pair<int,int>> bit[35] ;
    for (int i = 0 ; i < n ; i++) {
        for (int j = 0 ; j < 31 ; j++) {
            if (bit[j].empty()) continue ;
            auto [DP, l] = *bit[j].rbegin() ;
            if (__builtin_popcount(a[l] & a[i]) == k[i] && dp[i] < DP + 1) {
                dp[i] = DP + 1 ;
                pr[i] = l ;
            }
        }
        int cnt = __builtin_popcount(a[i]) ;
        bit[cnt].insert({dp[i], i}) ;
    }
    int pos = max_element(dp.begin(), dp.end()) - dp.begin() ;
    cout << dp[pos] << "\n" ;
    vector<int> res ;
    while (pos != -1) {
        res.push_back(pos) ;
        pos = pr[pos] ;
    }
    reverse(res.begin(), res.end()) ;
    for (int i : res) cout << i + 1 << ' ' ;
    return 0 ;
}

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