Submission #312277

#	Time	Username	Problem	Language	Result	Execution time	Memory
312277		ttnhuy313	Longest beautiful sequence (IZhO17_subsequence)	C++14	7 / 100	303 ms	86680 KiB

subsequence

#include <bits/stdc++.h>

using namespace std;

const int N = 1e5 + 5, half = (1 << 10) + 5, K = 21;
int n, a[N], k[N], f[half][half][K], dp[N], trace[N];


signed main() {
	ios_base::sync_with_stdio(0); cin.tie(0);
	// freopen("IZhO17_subsequence.INP", "r", stdin);
	// freopen("IZhO17_subsequence.OUT", "w", stdout);

	cin >> n;
	for (int i = 1; i <= n; ++i) {
		cin >> a[i];
	}
	for (int i = 1; i <= n; ++i)
		cin >> k[i];
	int halve = (1 << 10) - 1, res = 0;
	for (int i = 1; i <= n; ++i) {
		int s = (a[i] & halve);
		dp[i] = 1;
		for (int fd = 0; fd < halve; ++fd) {
			int fbc = __builtin_popcount((a[i] >> 10) & fd);
			if (fbc > k[i]) continue;
			int val = dp[f[fd][s][k[i] - fbc]] + 1;
			if (dp[i] < val) {
				dp[i] = val;
				trace[i] = f[fd][s][k[i] - fbc];
			}
		}
		for (int sc = 0; sc < halve; ++sc) {
			int pre = dp[f[a[i] >> 10][sc][__builtin_popcount(s & sc)]];
			if (pre < dp[i]) {
				f[a[i] >> 10][sc][__builtin_popcount(s & sc)] = i;
			}
		}
		res = max(res, dp[i]);
	}
	cout << res << endl;
	int i;
	for (i = 1; i <= n; ++i) if (dp[i] == res)
		break;
	vector <int> ans; ans.clear();
	while (i) {
		ans.push_back(i);
		i = trace[i];
	}
	reverse(ans.begin(), ans.end());
	for (int j : ans) cout << j << ' ';

	return 0;
}

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