Submission #1108844

#	Time	Username	Problem	Language	Result	Execution time	Memory
1108844		dubabuba	Longest beautiful sequence (IZhO17_subsequence)	C++14	Compilation error	0 ms	0 KiB

subsequence

#include <bits/stdc++.h>
using namespace std;

const int mxn = 1e5 + 10;
int a[mxn], dp[mxn];
int b[mxn], pr[mxn];
int n;

const int LOG = 8;
int mx[1 << LOG];

void solve() {
	int id = 1;
	for(int i = 1; i <= n; i++) {
		dp[i] = 1;
		for(int bit = 0; bit < (1 << LOG); bit++) {
			int t = a[i] & bit;
			if(__builtin_popcount(t) != b[i])
				continue;

			int j = mx[bit];
			if(dp[j] + 1 > dp[i]) {
				dp[i] = dp[j] + 1;
				pr[i] = j;
			}
		}
		if(dp[id] < dp[i])
			id = i;
		if(dp[mx[a[i]]] < dp[i])
			mx[a[i]] = i;
	}

	vector<int> ind;
	while(id) {
		ind.push_back(id);
		id = pr[id];
	}

	reverse(ind.begin(), ind.end());
	cout << ind.size() << endl;
	for(int i : ind)
		cout << i << ' ';
	cout << endl;
	exit(0);
}

int main() {
	cin >> n;
	for(int i = 1; i <= n; i++)
		cin >> a[i];
	for(int i = 1; i <= n; i++)
		cin >> b[i];

	if(i > 5000)
		solve();

	int id = 1;
	for(int i = 1; i <= n; i++) {
		dp[i] = 1;
		for(int j = 1; j < i; j++) {
			int t = a[i] & a[j];
			if(__builtin_popcount(t) != b[i])
				continue;
			if(dp[j] + 1 > dp[i]) {
				dp[i] = dp[j] + 1;
				pr[i] = j;
			}
		}

		if(dp[id] < dp[i])
			id = i;
	}

	vector<int> ind;
	while(id) {
		ind.push_back(id);
		id = pr[id];
	}

	reverse(ind.begin(), ind.end());
	// if(ind.size()) return 1;
	cout << (int)ind.size() << endl;
	for(int i : ind)
		cout << i << ' ';
	cout << endl;
	return 0;
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:54:5: error: 'i' was not declared in this scope
   54 |  if(i > 5000)
      |     ^