Submission #673254

#	Time	Username	Problem	Language	Result	Execution time	Memory
673254		Baytoro	Longest beautiful sequence (IZhO17_subsequence)	C++17	100 / 100	3738 ms	95168 KiB

subsequence

#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define int long long
#define endl '\n'
void fopn(string name){
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
const int INF=1e18,mod=998244353;
int n;
const int N=1e5+5;
int cnt(int x){
	return __builtin_popcount(x);
}
int dp[N],ar[1024][1024][11];
int a[N],k[N],p[N];
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++){
		int l=(a[i]>>10);
		int r=(a[i]&((1<<10)-1));
		int ans=0;
		for(int j=0;j<(1<<10);j++){
			int tmp=k[i]-cnt(j&r);
			if(tmp<0 || tmp>10) continue;
			if(dp[ans]<dp[ar[l][j][tmp]])
				ans=ar[l][j][tmp];
		}
		dp[i]=dp[ans]+1;
		p[i]=ans;
		for(int j=0;j<1024;j++){
			int tmp=cnt(j&l);
			if(dp[i]>dp[ar[j][r][tmp]])
				ar[j][r][tmp]=i;
		}
	}
	int res=1;
	for(int i=1;i<=n;i++){
		if(dp[i]>dp[res]) res=i;
	}
	vector<int> ans;
	while(res!=0){
		ans.pb(res);
		res=p[res];
	}
	cout<<ans.size()<<endl;
	reverse(all(ans));
	for(auto it: ans)
		cout<<it<<' ';
}
main(){
	//fopn("newbarn");
	ios;
	int T=1;
	//cin>>T;
	while(T--){
		solve();
	}
}

Compilation message (stderr)

subsequence.cpp:61:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   61 | main(){
      | ^~~~
subsequence.cpp: In function 'void fopn(std::string)':
subsequence.cpp:12:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
subsequence.cpp:13:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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