QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#116460 | #5434. Binary Substrings | LYC_music | WA | 0ms | 3512kb | C++14 | 2.0kb | 2023-06-29 10:18:29 | 2023-06-29 10:18:32 |
Judging History
answer
#include<bits/stdc++.h>
#define poly vector<int>
#define IOS ios::sync_with_stdio(false)
#define ll long long
#define mp make_pair
#define mt make_tuple
#define pa pair < int,int >
#define fi first
#define se second
#define inf 1e18
#define mod 998244353
#define int ll
#define N 1100005
using namespace std;
int n,p[N],vis[N],nxt[N],fa[N];
mt19937_64 rnd(time(0));
int gf(int x)
{
if (x==fa[x]) return x;
return fa[x]=gf(fa[x]);
}
void merge(int x,int y)
{
x=gf(x),y=gf(y);
if (x==y) return;
fa[y]=x;
}
void BellaKira()
{
cin>>n;
if (n==1)
{
cout<<1<<'\n';
return;
}
if (n==2)
{
cout<<01<<'\n';
return;
}
int m=0;
for (int i=1;i<=20;i++)
if ((1<<i)>=n-i+1)
{
m=i;
break;
}
while (1)
{
for (int i=0;i<(1<<m);i++)
fa[i]=i,p[i]=i;
shuffle(p,p+(1<<m),rnd);
for (int i=0;i<(1<<m);i++)
{
int o=((i>>(m-1))&1);
nxt[i]=(i*2+o)%(1<<m);
merge(i,nxt[i]);
// cout<<"!!"<<i<<" "<<nxt[i]<<'\n';
}
for (int i=0;i<(1<<m);i++)
{
int u=p[i];
int o=((u>>(m-1))&1);
int v=(u*2+o)%(1<<m);
if (nxt[u]==v)
{
v^=1;
// cout<<"??"<<u<<" "<<v<<" "<<gf(u)<<" "<<gf(v)<<'\n';
if (gf(u)!=gf(v))
{
// cout<<"??"<<u<<" "<<v<<'\n';
merge(u,v);
swap(nxt[u],nxt[u^(1<<(m-1))]);
}
}
}
int now=rnd()%(1<<m);
string ans="";
for (int j=m-1;j>=0;j--) ans+=char((now>>j)%2+'0');
// cout<<"!!"<<now<<endl;
for (int j=1;j<=n-m;j++)
{
now=nxt[now];
// cout<<"!!"<<now<<endl;
ans+=char(now%2+'0');
}
bool bl=1;
if (m>1)
{
m--;
memset(vis,0,sizeof(vis));
for (int i=0;i+m-1<ans.size();i++)
{
int x=0;
for (int j=i;j<i+m;j++) x=x*2+ans[j]-'0';
vis[x]=1;
}
// cout<<"???"<<m<<endl;
// for (int i=0;i<(1<<m);i++) cout<<i<<" "<<vis[i]<<'\n';
for (int i=0;i<(1<<m);i++) bl&=vis[i];
m++;
}
if (bl)
{
cout<<ans<<'\n';
return;
}
}
}
signed main()
{
IOS;
cin.tie(0);
int T=1;
while (T--)
{
BellaKira();
}
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 3512kb
input:
2
output:
1
result:
wrong answer Token parameter [name=s] equals to "1", doesn't correspond to pattern "[01]{2}"