Submission #1212544

#TimeUsernameProblemLanguageResultExecution timeMemory
1212544makrav"The Lyuboyn" code (IZhO19_lyuboyn)C++20
100 / 100
41 ms6592 KiB
#include <bits/stdc++.h>
#include <cassert>

using namespace std;
using ll = long long;

#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define pb push_back
#define ff first
#define sc second


int count(int x, int y) {
    return __builtin_popcount((x ^ y));
}

string int2s(int x, int siz) {
    string rs;
    while (x) {
        rs += char('0' + (x & 1));
        x >>= 1;
    }
    while (sz(rs) < siz) rs += '0';
    return rs;
}

void solve() {
    int n, k, t; cin >> n >> k >> t;
    string S; cin >> S;
    if (k % 2 == 0) {
        cout << "-1\n";
        return;
    }

    auto solve1 = [&](int N) {
        vector<int> rs = {0, 1};
        int cur = 2;
        while (rs.size() < N) {
            int cs = sz(rs) - 1;
            for (int j = cs; j >= 0; j--) rs.pb(rs[j] + cur);
            cur *= 2;
        }
        return rs;
    };

    auto solve = [&](int N, int K, auto&&self) -> vector<int> {
        int bts = 31 - __builtin_clz(N);
        if (K == 1) return solve1(N);
        if (K == bts - 1) {
            auto rs = solve1(N);
            // cout << N << ' ' << K << '\n';
            // for (int u : rs) cout << u << ' ';
            // cout << '\n';
            for (int i = 0; i < sz(rs); i += 2) rs[i] = N - rs[i] - 1;
            return rs;
        }
        auto lol = self(N / 2, K, self);
        // for (int u : lol) cout << u << ' ';
        // cout << '\n';
        for (int i = 0; i < sz(lol); i++) {
            for (int j = i + 1; j < sz(lol); j++) {
                if (count(lol[i], lol[j]) == K - 1 && count(lol[(i + 1) % (N / 2)], lol[(j + 1) % (N / 2)]) == K - 1) {
                    vector<int> haha;
                    int id = (i + 1) % (N / 2);
                    for (int j = 0; j < N / 2 - 1; j++) {
                        haha.pb(lol[id]);
                        id = (id + 1) % (N / 2);
                    }
                    haha.pb(lol[i]);
                    haha.pb(lol[j] + N / 2);
                    id = (j + N / 2 - 1) % (N / 2);
                    for (int j = 0; j < N / 2 - 1; j++) {
                        haha.pb(lol[id] + N / 2);
                        id = (id - 1 + N / 2) % (N / 2);
                    }
                    return haha;
                }
            }
        }
        assert(false);
    };
    auto LOL = solve((1 << n), k, solve);
    cout << (1 << n) << '\n';
    //for (auto u : LOL) cout << int2s(u, n) << '\n';
    for (int i = 0; i < sz(LOL); i++) {
        if (int2s(LOL[i], n) == S) {
            for (int j= 0; j < sz(LOL); j++) cout << int2s(LOL[(i + j) % sz(LOL)], n) << '\n';
            return;
        }
    }

    // auto solve2 = [&](int N, auto&&self) -> vector<int> {
    //     if (N == 2) return {3};
    //     if (N == 3) return {6, 3, 6};

    //     auto ans = self(N - 2, self);
    //     int X = 0;
    //     for (int i = 0; i < sz(ans); i++) X = (X ^ ans[i]);
    //     int start2 = 0;
    //     for (int val = 0; val < (1 << (N - 2)); val++) {
    //         if (count(0, val) == 1 && count(X, val) == 1) start2 = val;
    //     }
    //     assert(start2);
    //     vector<int> newans;
    //     vector<int> lol = {0, 2, 3, 1};
    //     for (int i = 0; i < 4; i++) {
    //         for (int u : ans) newans.pb(u);
    //         if (i < 3) {
    //             newans.pb((start2^X)+(lol[i+1]^lol[i])*(1<<(N-2)));
    //         }
    //     }
    //     return newans;
    // };
    // vector<int> rs = solve2(n, solve2);
    // int XR = 0;
    // for (auto &u : rs) XR ^= u;
    // rs.pb(XR);
    // vector<int> ans;
    // for (int i = 0; i < (1 << n); i++) {
    //     if (count(i, 0) == k && count(i, rs[0]) == k) {
    //         int cur1 = 0, cur2 = i;
    //         for (int j = 0; j < (1 << n); j++) {
    //             if (j % 2 == 0) {
    //                 ans.pb(cur1);
    //                 cur1 ^= rs[j >> 1];
    //             } else {
    //                 ans.pb(cur2);
    //                 cur2 ^= rs[((j >> 1) + 1) % sz(rs)];
    //             }
    //         }
    //         break;
    //     }
    // }
    // cout << sz(ans) << '\n';
    // for (int i = 0; i < sz(ans); i++) {
    //     if (int2s(ans[i], n) == S) {
    //         int cur = i, cnt = sz(ans);
    //         while (cnt) {
    //             cout << int2s(ans[cur], n) << '\n';
    //             cur = cur + 1;
    //             if (cur >= sz(ans)) cur = 0;
    //             cnt--;
    //         }
    //         return;
    //     }
    // }
}

signed main() {
    int tt = 1;
    #ifdef LOCAL 
        freopen("in.txt", "r", stdin);
        freopen("out.txt", "w", stdout);
        cin >> tt;
    #else
        ios::sync_with_stdio(false); 
        cin.tie(0); cout.tie(0);
    #endif

    while (tt--) {
        solve();
    }

    return 0;
}
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