Submission #342996

#	Time	Username	Problem	Language	Result	Execution time	Memory
342996		vonatlus	Longest beautiful sequence (IZhO17_subsequence)	C++14	23 / 100	102 ms	1900 KiB

subsequence

/// wa 

#pragma GCC optimize("O3")
//#pragma comment(linker, "/STACK:36777216")

#include<bits/stdc++.h>

#define x first
#define y second
#define pb push_back
#define sz(x) (int) x.size()
#define all(z) (z).begin(), (z).end()
 
using namespace std;

using ll = long long;
using pii = pair<int, int>;                                   

const int MOD = 1e9 + 7; 
const int INF = 1e9 + 1e2;
  
//mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void fin() {
#ifdef AM
    freopen(".in", "r", stdin);
#endif        
}                   

const bool flag = 0;

const int N = 1e5+10;

int dp[N], p[N], pos[N];

void ma1n() {
    int n;
    cin >> n;
    vector<int> a(n);
    for (int& x : a) {  
        cin >> x;
    }
    vector<int> k(n);
    for (int& x : k) {
        cin >> x;
    }
    memset(p, -1, sizeof(p));
    memset(pos, -1, sizeof(pos));
    int cur = 0;
    if (*max_element(all(a)) < (1<<8)) {
        int ans = 0;
        for (int i = 0; i < n; ++i) {   
            if (__builtin_popcount(a[i]) == k[i]) {
                dp[a[i]]++;
                if (dp[a[i]] > ans) {
                    ans = dp[a[i]], cur = i;
                }
                p[i] = pos[a[i]];        
            }
            dp[a[i]] = max(1, dp[a[i]]);
            for (int mask = 0; mask < (1<<8); ++mask) {
                if (mask == a[i]) continue;
                int cnt = __builtin_popcount(a[i]&mask);
                if (cnt == k[i] && dp[mask]+1 > dp[a[i]]) {
                    dp[a[i]] = dp[mask]+1;
                    if (dp[a[i]] > ans) {
                        ans = dp[a[i]], cur = i;
                    }
                    p[i] = pos[mask];
                }
            }
            pos[a[i]] = i;
        }
    } else {
        for (int i = 0; i < n; ++i) {
            dp[i] = 1;
            for (int j = 0; j < i; ++j) {
                int cnt = __builtin_popcount(a[i]&a[j]);
                if (cnt == k[i] && dp[i] < dp[j]+1) {
                    dp[i] = dp[j]+1, p[i] = j;
                }
            }
        }
        cur = max_element(dp, dp+N)-dp;
    }
    vector<int> ans;
    while (~cur) {
        ans.pb(cur);
        cur = p[cur];    
    }
    reverse(all(ans));
    cout << sz(ans) << "\n";
    for (int x : ans) cout << x+1 << " ";
} 

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(nullptr), fin();
    int ts = 1;
    if (flag) {
        cin >> ts;
    }
    while (ts--) {
        ma1n(); 
    }
    return 0;
}

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