Submission #344119

#	Time	Username	Problem	Language	Result	Execution time	Memory
344119		IZhO_2021_I_want_Silver	Longest beautiful sequence (IZhO17_subsequence)	C++14	0 / 100	2 ms	492 KiB

subsequence

#include <iostream>
#include <algorithm>
#include <vector>

using namespace std;

typedef pair <int, int> pii;

#define sz(a) (int)a.size()
#define all(a) a.begin(), a.end()
#define pb push_back
#define F first
#define S second

const int N = 1e5 + 5;
const int MX = (1 << 8) + 5;

int n, a[N], k[N], pre[N];
pii dp[MX];
vector <int> vec;

void solve() {
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i];
    }
    for (int i = 1; i <= n; ++i) {
        cin >> k[i];
    }
    for (int i = 1; i <= n; ++i) {
        for (int m = 0; m < MX-5; ++m) {
            if (__builtin_popcount((a[i] & m)) != k[i]) { continue; }
            //if (a[i] == m) { continue; }
            if (dp[a[i]].F < dp[m].F + 1) {
                pre[i] = dp[m].S;
                dp[a[i]] = {dp[m].F + 1, i};
            }
        }
        dp[a[i]] = max(dp[a[i]], {1, i});
    }
    int ans = 0, pos = 0;
    for (int i = 0; i < MX-5; ++i) {
        if (ans < dp[i].F) {
            ans = dp[i].F;
            pos = dp[i].S;
        }
    }
    while (pre[pos]) {
        vec.pb(pos);
        pos = pre[pos];
    }
    vec.pb(pos);
    reverse(all(vec));
    cout << sz(vec) <<"\n";
    for (int i = 0; i < sz(vec); ++i) {
        cout << vec[i] <<" ";
    }
}

int main () {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	int tests = 1;
	//cin >> tests;
	while (tests --) {
		solve();
	}
	return 0;
}
/*
    Just Chalish!
4
1 2 3 4
10 0 1 0

2
8 9
20 0

5
5 3 5 3 5
10 1 20 1 20
*/

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