#261687 (C++17) No.5002 stick xor

提出ソース
結果

問題	No.5002 stick xor
ユーザー	mai
提出日時	2018-05-31 00:01:21
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	964 ms / 1,000 ms
コード長	20,608 bytes
コンパイル時間	37,046 ms
実行使用メモリ	1,620 KB
スコア	-43,899
最終ジャッジ日時	2018-05-31 00:02:00
ジャッジサーバーID （参考情報）	judge7 /
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テストケース

テストケース表示
入力	結果	実行時間実行使用メモリ
testcase_00	AC	963 ms 1,620 KB
testcase_01	AC	964 ms 1,620 KB
testcase_02	AC	964 ms 1,620 KB
testcase_03	AC	964 ms 1,616 KB
testcase_04	AC	963 ms 1,616 KB
testcase_05	AC	963 ms 1,616 KB
testcase_06	AC	964 ms 1,616 KB
testcase_07	AC	963 ms 1,612 KB
testcase_08	AC	964 ms 1,612 KB
testcase_09	AC	963 ms 1,620 KB
testcase_10	AC	962 ms 1,612 KB
testcase_11	AC	963 ms 1,616 KB
testcase_12	AC	963 ms 1,616 KB
testcase_13	AC	963 ms 1,612 KB
testcase_14	AC	964 ms 1,620 KB
testcase_15	AC	963 ms 1,616 KB
testcase_16	AC	963 ms 1,616 KB
testcase_17	AC	963 ms 1,616 KB
testcase_18	AC	964 ms 1,620 KB
testcase_19	AC	963 ms 1,616 KB
testcase_20	AC	963 ms 1,616 KB
testcase_21	AC	964 ms 1,616 KB
testcase_22	AC	963 ms 1,612 KB
testcase_23	AC	963 ms 1,620 KB
testcase_24	AC	962 ms 1,616 KB
testcase_25	AC	963 ms 1,616 KB
testcase_26	AC	963 ms 1,616 KB
testcase_27	AC	964 ms 1,616 KB
testcase_28	AC	963 ms 1,616 KB
testcase_29	AC	964 ms 1,612 KB
testcase_30	AC	964 ms 1,616 KB
testcase_31	AC	964 ms 1,616 KB
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ソースコード

raw source code
#pragma GCC optimize ("O3")
#pragma GCC target ("avx")
#include "bits/stdc++.h"

using namespace std;
using ll = long long int;

#define debug(v) {printf("L%d %s > ",__LINE__,#v);cout<<(v)<<endl;}
#define debugv(v) {printf("L%d %s > ",__LINE__,#v);for(auto e:(v)){cout<<e<<" ";}cout<<endl;}
#define debuga(m,w) {printf("L%d %s > ",__LINE__,#m);for(int x=0;x<(w);x++){cout<<(m)[x]<<" ";}cout<<endl;}
#define debugaa(m,h,w) {printf("L%d %s >\n",__LINE__,#m);for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){cout<<(m)[y][x]<<" ";}cout<<endl;}}
#define ALL(v) (v).begin(),(v).end()
#define repeat(cnt,l) for(remove_const<decltype(l)>::type cnt=0;(cnt)<(l);++(cnt))
#define rrepeat(cnt,l) for(auto cnt=(l)-1;0<=(cnt);--(cnt))
#define iterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);++(cnt))
#define diterate(cnt,b,e) for(auto cnt=(b);(cnt)!=(e);--(cnt))
const ll MD = 1000000007ll; const long double PI = 3.1415926535897932384626433832795L;
inline void assert_call(bool assertion, function<void()> f) { if (!assertion) { cerr << "assertion fault:" << endl; f(); abort(); } }
template<typename T1, typename T2> inline ostream& operator <<(ostream &o, const pair<T1, T2> p) { o << '(' << p.first << ':' << p.second << ')'; return o; }
template<typename Vec> inline ostream& _ostream_vecprint(ostream &o, const Vec& p) { o << '['; for (auto& e : p) o << e << ','; o << ']'; return o; }
template<typename T> inline ostream& operator<<(ostream& o, const vector<T>& v) { return _ostream_vecprint(o, v); }
template<typename T, size_t S> inline ostream& operator<<(ostream& o, const array<T, S>& v) { return _ostream_vecprint(o, v); }
template<typename T> inline T& maxset(T& to, const T& val) { return to = max(to, val); }
template<typename T> inline T& minset(T& to, const T& val) { return to = min(to, val); }
void bye(string s, int code = 0) { cout << s << endl; exit(code); }

struct XorShift {
    using result_type = uint64_t;
    result_type x_;
    XorShift(result_type x = 88172645463325252ull) :x_(x) {};
    static constexpr inline result_type min() { return 0ull; }
    static constexpr inline result_type max() { return numeric_limits<result_type>::max(); }
    inline result_type operator()() { x_ ^= x_ << 7; return x_ ^= x_ >> 9; }
    inline void discard(unsigned long long z) { while (z--) operator()(); }
};
XorShift randdev;
template<typename T> inline T rand(T l, T h) { return uniform_int_distribution<T>(l, h)(randdev); }
template<> inline double rand<double>(double l, double h) { return uniform_real_distribution<double>(l, h)(randdev); }
template<> inline float rand<float>(float l, float h) { return uniform_real_distribution<float>(l, h)(randdev); }

#if defined(_WIN32) || defined(_WIN64)
#define getchar_unlocked _getchar_nolock
#define putchar_unlocked _putchar_nolock
#elif defined(__GNUC__)
#else
#define getchar_unlocked getchar
#define putchar_unlocked putchar
#endif
namespace {
#define isvisiblechar(c) (0x21<=(c)&&(c)<=0x7E)
    class MaiScanner {
    public:
        template<typename T> void input_integer(T& var) {
            var = 0; T sign = 1;
            int cc = getchar_unlocked();
            for (; cc<'0' || '9'<cc; cc = getchar_unlocked())
                if (cc == '-') sign = -1;
            for (; '0' <= cc && cc <= '9'; cc = getchar_unlocked())
                var = (var << 3) + (var << 1) + cc - '0';
            var = var * sign;
        }
        inline int c() { return getchar_unlocked(); }
        inline MaiScanner& operator>>(int& var) { input_integer<int>(var); return *this; }
        inline MaiScanner& operator>>(long long& var) { input_integer<long long>(var); return *this; }
        inline MaiScanner& operator>>(string& var) {
            int cc = getchar_unlocked();
            for (; !isvisiblechar(cc); cc = getchar_unlocked());
            for (; isvisiblechar(cc); cc = getchar_unlocked())
                var.push_back(cc);
            return *this;
        }
        template<typename IT> void in(IT begin, IT end) { for (auto it = begin; it != end; ++it) *this >> *it; }
    };
    class MaiPrinter {
    public:
        template<typename T>
        void output_integer(T var) {
            if (var == 0) { putchar_unlocked('0'); return; }
            if (var < 0)
                putchar_unlocked('-'),
                var = -var;
            char stack[32]; int stack_p = 0;
            while (var)
                stack[stack_p++] = '0' + (var % 10),
                var /= 10;
            while (stack_p)
                putchar_unlocked(stack[--stack_p]);
        }
        inline MaiPrinter& operator<<(char c) { putchar_unlocked(c); return *this; }
        inline MaiPrinter& operator<<(int var) { output_integer<int>(var); return *this; }
        inline MaiPrinter& operator<<(long long var) { output_integer<long long>(var); return *this; }
        inline MaiPrinter& operator<<(char* str_p) { while (*str_p) putchar_unlocked(*(str_p++)); return *this; }
        inline MaiPrinter& operator<<(const string& str) {
            const char* p = str.c_str();
            const char* l = p + str.size();
            while (p < l) putchar_unlocked(*p++);
            return *this;
        }
        template<typename IT> void join(IT begin, IT end, char sep = '\n') { for (auto it = begin; it != end; ++it) *this << *it << sep; }
    };
}
MaiScanner scanner;
MaiPrinter printer;


#define TIME chrono::system_clock::now()
#define MILLISEC(t) (chrono::duration_cast<chrono::milliseconds>(t).count())


// Edge構造体を定義する無向グラフ
class GraphE {
public:
    typedef int W_T;
    struct Edge {
        int u, v;
        W_T value;
        Edge(int from = 0, int to = 0, W_T value = 0) :u(from), v(to), value(value) {}
        inline int to(int _v) const { return _v == v ? u : v; }
    };
    size_t n;
    vector<vector<int>> vertex_to;
    vector<Edge> edges;

    GraphE(int n = 1) :n(n), vertex_to(n) { }

    void resize(size_t _n) {
        n = _n;
        vertex_to.resize(_n);
    }
    void connect(int from, int to, W_T val = 0) {
        vertex_to[(size_t)from].push_back((int)edges.size());
        vertex_to[(size_t)to].push_back((int)edges.size());
        edges.emplace_back(from, to, val);
    }
};



// Rectangle
struct Rect {
    int top, left, bottom, right;
    Rect(int t = 0, int l = 0, int b = 0, int r = 0) :top(t), left(l), bottom(b), right(r) { }
    inline int area() { return (right - left + 1)*(bottom - top + 1); }
    inline bool operator==(Rect r) const { return top == r.top&&left == r.left&&bottom == r.bottom&&right == r.right; }
    inline bool operator<(Rect r) const { return make_tuple(top, left, bottom, right) < make_tuple(r.top, r.left, r.bottom, r.right); }
};


/// <summary>
/// i番目の要素を削除する．削除後の順序は保証されない
/// </summary>
template<typename T>
void vec_erase(vector<T>& vec, size_t idx) {
    if (vec.size() != idx + 1)
        swap(vec[idx], vec.back());
    vec.pop_back();
}



auto beginTime = TIME;



// 問題文と入力
const int N = 60, K = 500;
int L[K];
int A[N][N];
const int Lmax = 25;

// 長さiの長方形のインデックス
// L[j]=iであるようなjの集合が格納される．
vector<int> idxsL[Lmax + 1];

//
vector<vector<Rect>> result(Lmax + 1);


// workspace
decltype(A) my_A;


inline void apply(decltype(A) f, Rect r) {
    iterate(y, r.top, r.bottom + 1)
        iterate(x, r.left, r.right + 1)
        f[y][x] ^= 1;
}



// 
void input() {

    int n, k;
    scanner >> n >> k;
    assert(n == N && k == K);
    scanner.in(L, L + K);
    repeat(i, N) {
        string str; scanner >> str;
        repeat(j, N) A[i][j] = str[j] == '0'; // << ============== スコア最小を目指す
    }

    // - - - - -

    repeat(i, K)
        idxsL[L[i]].push_back(i);
}



//
void solve1() {

    //copy(A[0], A[N], my_A[0]);
    repeat(i, N) repeat(j, N) my_A[i][j] = A[i][j];

                                                   // l in 2..Lmax
    diterate(l, Lmax, 1) {
        repeat(_, idxsL[l].size()) {

            pair<int, int> best_score(-1, 0);
            Rect best_rect;
            decltype(randdev()) best_seed;

            // 水平方向に置く場合を全探索
            // 探索
            repeat(y, N) {
                int sum = 0;
                repeat(x, l - 1)
                    sum += my_A[y][x];
                repeat(x, N + 1 - l) {
                    sum += my_A[y][x + l - 1];
                    int score = sum + (my_A[y][x] * my_A[y][x + l - 1]) * 5;
                    auto p = make_pair(score, (int)randdev());
                    if (best_score < p)
                        best_score = p,
                        best_rect = Rect(y, x, y, x + l - 1);
                    sum -= my_A[y][x];
                }
            }

            // 垂直方向に置く場合を全探索
            // 探索
            repeat(x, N) {
                int sum = 0;
                repeat(y, l - 1)
                    sum += my_A[y][x];
                repeat(y, N + 1 - l) {
                    sum += my_A[y + l - 1][x];
                    int score = sum + (my_A[y][x] * my_A[y + l - 1][x]) * 5;
                    auto p = make_pair(score, (int)randdev());
                    if (best_score < p)
                        best_score = p,
                        best_rect = Rect(y, x, y + l - 1, x),
                        best_seed = randdev();
                    sum -= my_A[y][x];
                }
            }


            result[l].push_back(best_rect);

            apply(my_A, best_rect);
        }
    }
}



//
void solve2() {

    // 調整
    diterate(l, Lmax, 1) {
        for (Rect& rect : result[l]) {
            if (rect.left == rect.right) {
                int x = rect.left;
                if (0 < rect.top && my_A[rect.top - 1][x] == 1 && my_A[rect.bottom][x] == 1)
                    my_A[rect.top - 1][x] ^= 1, my_A[rect.bottom][x] ^= 1,
                    --rect.top, --rect.bottom;
                else if (rect.bottom < N - 1 && my_A[rect.top][x] == 1 && my_A[rect.bottom + 1][x] == 1)
                    my_A[rect.top][x] ^= 1, my_A[rect.bottom + 1][x] ^= 1,
                    ++rect.top, ++rect.bottom;
            }
            else if (rect.top == rect.bottom) {
                int y = rect.top;
                if (0 < rect.left && my_A[y][rect.left - 1] == 1 && my_A[y][rect.right] == 1)
                    my_A[y][rect.left - 1] ^= 1, my_A[y][rect.right] ^= 1,
                    --rect.left, --rect.right;
                else if (rect.right < N - 1 && my_A[y][rect.left] == 1 && my_A[y][rect.right + 1] == 1)
                    my_A[y][rect.left] ^= 1, my_A[y][rect.right + 1] ^= 1,
                    ++rect.left, ++rect.right;
            }
        }
    }
}



decltype(A) stored_A;
vector<vector<Rect>> my_result(Lmax + 1);

//
void burning_stage() {
    //copy(my_A[0], my_A[N], stored_A[0]);
    repeat(i, N) repeat(j, N) stored_A[i][j] = my_A[i][j];
    my_result = result;

    int best_score = 0;

    repeat(i, N) repeat(j, N) best_score += my_A[i][j];

    clog << "before : " << best_score << '\n';

    int current_score = best_score;
    int best_loop = 0;
    int current_loop = 0;
    int ana_updatecnt = 0;
    for (;MILLISEC(TIME - beginTime) < 960; ++current_loop)
    {
        // thr/1024
        int thr = 334;//400 - (current_loop - best_loop) * 2;
        int seed = randdev() & 1023;

        if (seed & 1) {
            int l = rand(2, Lmax);
            assert(!my_result[l].empty());
            int i = rand(0, (int)my_result[l].size() - 1);
            Rect& ri = my_result[l][i];

            if (ri.left == ri.right) {
                int a0 = ri.top == 0 ? 0 : my_A[ri.top-1][ri.left];
                int a1 = my_A[ri.top][ri.left];
                int a2 = my_A[ri.bottom][ri.left];
                int a3 = ri.bottom == N - 1 ? 0 : my_A[ri.bottom + 1][ri.left];
                a0 = a0 * 2 - 1;
                a1 = a1 * 2 - 1;
                a2 = a2 * 2 - 1;
                a3 = a3 * 2 - 1;
                if (thr > seed) {
                    // perhaps unhappy
                    if (ri.top == 0 || (ri.bottom != N - 1 && randdev() & 1)) {
                        current_score -= a3 + a1;
                        my_A[ri.top][ri.left] ^= 1;
                        my_A[ri.bottom + 1][ri.left] ^= 1;
                        ri.top++; ri.bottom++;
                    }
                    else {
                        current_score -= a0 + a2;
                        my_A[ri.bottom][ri.left] ^= 1;
                        my_A[ri.top - 1][ri.left] ^= 1;
                        ri.top--; ri.bottom--;
                    }
                }
                else {
                    bool select_up = 0, select_down = 0;
                    select_up = (ri.top != 0 && a3 + a1 > 0);
                    select_down = (ri.bottom != N-1 && a0 + a2 > 0);

                    if (select_up && (!select_down || (randdev()&1))) {
                        current_score -= a3 + a1;
                        my_A[ri.top][ri.left] ^= 1;
                        my_A[ri.bottom + 1][ri.left] ^= 1;
                        ri.top++; ri.bottom++;
                    }
                    else if (select_down) {
                        current_score -= a0 + a2;
                        my_A[ri.bottom][ri.left] ^= 1;
                        my_A[ri.top - 1][ri.left] ^= 1;
                        ri.top--; ri.bottom--;
                    }
                }
            }
            else {
                int a0 = ri.left == 0 ? 0 : my_A[ri.top][ri.left - 1];
                int a1 = my_A[ri.top][ri.left];
                int a2 = my_A[ri.top][ri.right];
                int a3 = ri.right == N - 1 ? 0 : my_A[ri.top][ri.right + 1];
                a0 = a0 * 2 - 1;
                a1 = a1 * 2 - 1;
                a2 = a2 * 2 - 1;
                a3 = a3 * 2 - 1;
                if (thr > seed) {
                    // perhaps unhappy
                    if (ri.left == 0 || (ri.right != N - 1 && randdev() & 1)) {
                        current_score -= a3 + a1;
                        my_A[ri.top][ri.left] ^= 1;
                        my_A[ri.top][ri.right + 1] ^= 1;
                        ri.left++; ri.right++;
                    }
                    else {
                        current_score -= a0 + a2;
                        my_A[ri.top][ri.right] ^= 1;
                        my_A[ri.top][ri.left - 1] ^= 1;
                        ri.left--; ri.right--;
                    }
                }
                else {
                    bool select_up = 0, select_down = 0;
                    select_up = (ri.left != 0 && a3 - a1 > 0);
                    select_down = (ri.right != N - 1 && a0 - a2 > 0);

                    if (select_up && (!select_down || (randdev() & 1))) {
                        current_score -= a3 + a1;
                        my_A[ri.top][ri.left] ^= 1;
                        my_A[ri.top][ri.right + 1] ^= 1;
                        ri.left++; ri.right++;
                    }
                    else if (select_down) {
                        current_score -= a0 + a2;
                        my_A[ri.top][ri.right] ^= 1;
                        my_A[ri.top][ri.left - 1] ^= 1;
                        ri.left--; ri.right--;
                    }
                }
            }
        }
        else {
            int l = rand(3, Lmax);
            assert(!my_result[l].empty());
            assert(!my_result[l - 1].empty());
            int i = rand(0, (int)my_result[l].size() - 1); // ながいほう
            int j = rand(0, (int)my_result[l - 1].size() - 1); // みじかいほう
            Rect ri = my_result[l][i];
            Rect rj = my_result[l - 1][j];

            int ai, aj = 0;
            if (ri.left == ri.right)
                ai = my_A[ri.top][ri.left] | my_A[ri.bottom][ri.left];
            else
                ai = my_A[ri.top][ri.left] | my_A[ri.top][ri.right];
            if (rj.left == rj.right) {
                if (rj.top != 0) aj |= my_A[rj.top - 1][rj.left];
                if (rj.bottom != N-1) aj |= my_A[rj.bottom + 1][rj.left];
            }
            else {
                if (rj.left != 0) aj |= my_A[rj.top][rj.left - 1];
                if (rj.right != N - 1) aj |= my_A[rj.top][rj.right + 1];
            }

            // if (thr > seed) {
            //     // perhaps unhappy
            // }
            // else
            if (ai && aj) {
                vec_erase(my_result[l], i);
                vec_erase(my_result[l-1], j);

                // ながいほうだった場所にみじかいほうを置く
                if (ri.left == ri.right) {
                    if (my_A[ri.top][ri.left])
                        my_result[l - 1].emplace_back(ri.top + 1, ri.left, ri.bottom, ri.right),
                        my_A[ri.top][ri.left] ^= 1;
                    else if (my_A[ri.bottom][ri.left])
                        my_result[l - 1].emplace_back(ri.top, ri.left, ri.bottom - 1, ri.right),
                        my_A[ri.bottom][ri.left] ^= 1;
                }
                else {
                    if (my_A[ri.top][ri.left])
                        my_result[l - 1].emplace_back(ri.top, ri.left + 1, ri.bottom, ri.right),
                        my_A[ri.top][ri.left] ^= 1;
                    else if (my_A[ri.top][ri.right])
                        my_result[l - 1].emplace_back(ri.top, ri.left, ri.bottom, ri.right - 1),
                        my_A[ri.top][ri.right] ^= 1;
                }
                // みじかいほうだった場所にながいほうを置く
                if (rj.left == rj.right) {
                    if (rj.top != 0 && (my_A[rj.top - 1][rj.left]))
                        my_result[l].emplace_back(rj.top - 1, rj.left, rj.bottom, rj.right),
                        my_A[rj.top - 1][rj.left] ^= 1;
                    else if (rj.bottom != N - 1 && my_A[rj.bottom + 1][rj.left])
                        my_result[l].emplace_back(rj.top, rj.left, rj.bottom + 1, rj.right),
                        my_A[rj.bottom + 1][rj.left] ^= 1;
                }
                else {
                    if (rj.left != 0 && (my_A[rj.top][rj.left - 1]))
                        my_result[l].emplace_back(rj.top, rj.left - 1, rj.bottom, rj.right),
                        my_A[rj.top][rj.left - 1] ^= 1;
                    else if (rj.right != N - 1 && my_A[rj.top][rj.right + 1])
                        my_result[l].emplace_back(rj.top, rj.left, rj.bottom, rj.right + 1),
                        my_A[rj.top][rj.right + 1] ^= 1;
                }
                current_score -= 2;
            }

        }

        if (best_score > current_score) {
            ++ana_updatecnt;
            best_score = current_score;
            best_loop = current_loop;
            // save
            //copy(my_A[0], my_A[N], stored_A[0]);
            repeat(i, N) repeat(j, N) stored_A[i][j] = my_A[i][j];
            result = my_result;
        }
        if (current_loop - best_loop > 200) {
            best_loop = current_loop;
            // restore
            repeat(i, N) repeat(j, N) my_A[i][j] = stored_A[i][j];
            my_result = result;
            current_score = best_score;
        }
    }
    clog << "after : " << best_score << '\n';
    clog << "ana_updatecnt = " << ana_updatecnt << '\n';
    clog << "current_loop = " << current_loop << '\n';
    clog << "best_loop = " << best_loop << '\n';

    //copy(stored_A[0], stored_A[N], my_A[0]);
    repeat(i, N) repeat(j, N) my_A[i][j] = stored_A[i][j];
}



//
void solve_final() {

    // l in 1
    {
        const int l = 1;
        {
            int cnt = idxsL[1].size();

            Rect best_rect;

            // 探索
            repeat(y, N) repeat(x, N) {
                int score = 0;
                if (my_A[y][x]) {
                    result[1].push_back(Rect(y, x, y, x));
                    // apply(my_A, best_rect);
                    if (--cnt <= 0) {
                        y = N, x = N; break;
                    }
                }
            }

        }
    }
}



//
void output() {

    vector<Rect> answer(K);

    iterate(l, 1, Lmax + 1) repeat(i, idxsL[l].size()) {
        answer[idxsL[l][i]] = result[l][i];
    }

    for (Rect r : answer)
        printf("%d %d %d %d\n", r.top + 1, r.left + 1, r.bottom + 1, r.right + 1);

}



int main() {

    input();
    //beginTime = TIME; // for handinput
    solve1();
    //solve2();
    burning_stage();
    solve_final();
    output();



    return 0;
}
yukicoder

結果

テストケース

ソースコード
