Submission #1128437

#	Time	Username	Problem	Language	Result	Execution time	Memory
1128437		koukirocks	"The Lyuboyn" code (IZhO19_lyuboyn)	C++20	100 / 100	184 ms	6580 KiB

lyuboyn

#include <bits/stdc++.h>
#define speed ios_base::sync_with_stdio(0); cin.tie(0)
#define all(x) (x).begin(),(x).end()
#define F first
#define S second
//#pragma GCC optimize("O3,unroll-loops")
//#pragma GCC target("avx,avx2")
//#pragma GCC target("popcnt")
 
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ldb;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
 
const ll MAX=2e5+10,P=1e9+7;
const ll INF=0x3f3f3f3f,oo=0x3f3f3f3f3f3f3f3f;
const ldb eps=1e-6;
const ldb PI=acos(-1.0);
const int dir[4][2]={{0,1},{0,-1},{1,0},{-1,0}};
template<typename T>
using vvector = vector<vector<T>>;

void print(int x,int k) {
    for (int i=k-1;i>=0;i--) {
        cout<<bool(x&(1<<i));
    }
    cout<<"\n";
}

void gen(int n,vector<int> &seq,int now) {
    for (int i=0;i<(1<<n);i++) {
        seq.push_back(now);
        now=((1<<n)-1)^now;
        if (i&1) {
            now^=(-now&now)<<1;
        } else now^=1;
    }
}

int main() {
    speed;
    int n,k,t;
    string s;
    cin>>n>>k>>t;
    cin>>s;
    if (!(k&1) or n<=k) {
        cout<<"-1\n";
        return 0;
    }
    int now=0;
    for (int i=0;i<n;i++) {
        now<<=1;
        now+=s[i]-'0';
    }
    vector<int> seq;
    gen(k+1,seq,0);
    for (int i=k+1;i<n;i++) {
        int id=-1;
        for (int j=0;j<(1<<i);j++) {
            if (__builtin_popcount(seq[(1<<i)-1]^seq[j])==k-1 and __builtin_popcount(seq[0]^seq[(j+(1<<i)-1)%(1<<i)])==k-1) {
                id=j;
                break;
            }
        }
        if (id!=-1) {
            for (int j=0;j<(1<<i);j++) {
                seq.push_back((1<<i)+seq[(id+j)%(1<<i)]);
            }
            continue;
        }
        for (int j=0;j<(1<<i);j++) {
            if (__builtin_popcount(seq[(1<<i)-1]^seq[j])==k-1 and __builtin_popcount(seq[0]^seq[(j+1)%(1<<i)])==k-1) {
                id=j;
                break;
            }
        }
        if (id!=-1) {
            for (int j=0;j<(1<<i);j++) {
                seq.push_back((1<<i)+seq[(id-j+(1<<i))%(1<<i)]);
            }
            continue;
        } else {
            cout<<"-1\n";
            return 0;
        }
    }
    int id=0;
    for (int i=0;i<(1<<n);i++) {
        // cout<<seq[i]<<" "<<now<<" seq now\n";
        if (seq[i]==now) id=i;
    }
    cout<<(1<<n)<<"\n";
    for (int i=id;i<(1<<n);i++) print(seq[i],n);
    for (int i=0;i<id;i++) print(seq[i],n);
    return 0;
}

• Subtask 1: 5 / 5
• Subtask 2: 3 / 3
• Subtask 3: 11 / 11
• Subtask 4: 15 / 15
• Subtask 5: 18 / 18
• Subtask 6: 31 / 31
• Subtask 7: 17 / 17
• Subtask 8: 0 / 0