結果

問題 No.2457 Stampaholic (Easy)
ユーザー tokusakuraitokusakurai
提出日時 2023-09-01 23:01:35
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 165 ms / 4,000 ms
コード長 7,549 bytes
コンパイル時間 2,670 ms
コンパイル使用メモリ 212,032 KB
実行使用メモリ 18,920 KB
最終ジャッジ日時 2023-09-01 23:01:40
合計ジャッジ時間 4,681 ms
ジャッジサーバーID
(参考情報)
judge16 / judge13
このコードへのチャレンジ
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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 2 ms
4,380 KB
testcase_01 AC 158 ms
18,844 KB
testcase_02 AC 19 ms
4,648 KB
testcase_03 AC 1 ms
4,376 KB
testcase_04 AC 1 ms
4,380 KB
testcase_05 AC 164 ms
18,920 KB
testcase_06 AC 23 ms
15,180 KB
testcase_07 AC 2 ms
4,380 KB
testcase_08 AC 20 ms
4,924 KB
testcase_09 AC 13 ms
4,380 KB
testcase_10 AC 30 ms
5,896 KB
testcase_11 AC 43 ms
7,040 KB
testcase_12 AC 62 ms
9,596 KB
testcase_13 AC 86 ms
11,304 KB
testcase_14 AC 133 ms
17,204 KB
testcase_15 AC 165 ms
18,916 KB
testcase_16 AC 165 ms
18,832 KB
testcase_17 AC 144 ms
18,888 KB
testcase_18 AC 13 ms
4,380 KB
testcase_19 AC 2 ms
4,376 KB
testcase_20 AC 1 ms
4,376 KB
testcase_21 AC 12 ms
8,320 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (n); i++)
#define per(i, n) for (int i = (n)-1; i >= 0; i--)
#define rep2(i, l, r) for (int i = (l); i < (r); i++)
#define per2(i, l, r) for (int i = (r)-1; i >= (l); i--)
#define each(e, v) for (auto &e : v)
#define MM << " " <<
#define pb push_back
#define eb emplace_back
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
#define sz(x) (int)x.size()
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;

template <typename T>
using minheap = priority_queue<T, vector<T>, greater<T>>;

template <typename T>
using maxheap = priority_queue<T>;

template <typename T>
bool chmax(T &x, const T &y) {
    return (x < y) ? (x = y, true) : false;
}

template <typename T>
bool chmin(T &x, const T &y) {
    return (x > y) ? (x = y, true) : false;
}

template <typename T>
int flg(T x, int i) {
    return (x >> i) & 1;
}

int pct(int x) { return __builtin_popcount(x); }
int pct(ll x) { return __builtin_popcountll(x); }
int topbit(int x) { return (x == 0 ? -1 : 31 - __builtin_clz(x)); }
int topbit(ll x) { return (x == 0 ? -1 : 63 - __builtin_clzll(x)); }
int botbit(int x) { return (x == 0 ? -1 : __builtin_ctz(x)); }
int botbit(ll x) { return (x == 0 ? -1 : __builtin_ctzll(x)); }

template <typename T>
void print(const vector<T> &v, T x = 0) {
    int n = v.size();
    for (int i = 0; i < n; i++) cout << v[i] + x << (i == n - 1 ? '\n' : ' ');
    if (v.empty()) cout << '\n';
}

template <typename T>
void printn(const vector<T> &v, T x = 0) {
    int n = v.size();
    for (int i = 0; i < n; i++) cout << v[i] + x << '\n';
}

template <typename T>
int lb(const vector<T> &v, T x) {
    return lower_bound(begin(v), end(v), x) - begin(v);
}

template <typename T>
int ub(const vector<T> &v, T x) {
    return upper_bound(begin(v), end(v), x) - begin(v);
}

template <typename T>
void rearrange(vector<T> &v) {
    sort(begin(v), end(v));
    v.erase(unique(begin(v), end(v)), end(v));
}

template <typename T>
vector<int> id_sort(const vector<T> &v, bool greater = false) {
    int n = v.size();
    vector<int> ret(n);
    iota(begin(ret), end(ret), 0);
    sort(begin(ret), end(ret), [&](int i, int j) { return greater ? v[i] > v[j] : v[i] < v[j]; });
    return ret;
}

template <typename T>
void reorder(vector<T> &a, const vector<int> &ord) {
    int n = a.size();
    vector<T> b(n);
    for (int i = 0; i < n; i++) b[i] = a[ord[i]];
    swap(a, b);
}

template <typename T>
T floor(T x, T y) {
    assert(y != 0);
    if (y < 0) x = -x, y = -y;
    return (x >= 0 ? x / y : (x - y + 1) / y);
}

template <typename T>
T ceil(T x, T y) {
    assert(y != 0);
    if (y < 0) x = -x, y = -y;
    return (x >= 0 ? (x + y - 1) / y : x / y);
}

template <typename S, typename T>
pair<S, T> operator+(const pair<S, T> &p, const pair<S, T> &q) {
    return make_pair(p.first + q.first, p.second + q.second);
}

template <typename S, typename T>
pair<S, T> operator-(const pair<S, T> &p, const pair<S, T> &q) {
    return make_pair(p.first - q.first, p.second - q.second);
}

template <typename S, typename T>
istream &operator>>(istream &is, pair<S, T> &p) {
    S a;
    T b;
    is >> a >> b;
    p = make_pair(a, b);
    return is;
}

template <typename S, typename T>
ostream &operator<<(ostream &os, const pair<S, T> &p) {
    return os << p.first << ' ' << p.second;
}

struct io_setup {
    io_setup() {
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cout << fixed << setprecision(15);
        cerr << fixed << setprecision(15);
    }
} io_setup;

constexpr int inf = (1 << 30) - 1;
constexpr ll INF = (1LL << 60) - 1;
// constexpr int MOD = 1000000007;
constexpr int MOD = 998244353;

template <int mod>
struct Mod_Int {
    int x;

    Mod_Int() : x(0) {}

    Mod_Int(long long y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}

    static int get_mod() { return mod; }

    Mod_Int &operator+=(const Mod_Int &p) {
        if ((x += p.x) >= mod) x -= mod;
        return *this;
    }

    Mod_Int &operator-=(const Mod_Int &p) {
        if ((x += mod - p.x) >= mod) x -= mod;
        return *this;
    }

    Mod_Int &operator*=(const Mod_Int &p) {
        x = (int)(1LL * x * p.x % mod);
        return *this;
    }

    Mod_Int &operator/=(const Mod_Int &p) {
        *this *= p.inverse();
        return *this;
    }

    Mod_Int &operator++() { return *this += Mod_Int(1); }

    Mod_Int operator++(int) {
        Mod_Int tmp = *this;
        ++*this;
        return tmp;
    }

    Mod_Int &operator--() { return *this -= Mod_Int(1); }

    Mod_Int operator--(int) {
        Mod_Int tmp = *this;
        --*this;
        return tmp;
    }

    Mod_Int operator-() const { return Mod_Int(-x); }

    Mod_Int operator+(const Mod_Int &p) const { return Mod_Int(*this) += p; }

    Mod_Int operator-(const Mod_Int &p) const { return Mod_Int(*this) -= p; }

    Mod_Int operator*(const Mod_Int &p) const { return Mod_Int(*this) *= p; }

    Mod_Int operator/(const Mod_Int &p) const { return Mod_Int(*this) /= p; }

    bool operator==(const Mod_Int &p) const { return x == p.x; }

    bool operator!=(const Mod_Int &p) const { return x != p.x; }

    Mod_Int inverse() const {
        assert(*this != Mod_Int(0));
        return pow(mod - 2);
    }

    Mod_Int pow(long long k) const {
        Mod_Int now = *this, ret = 1;
        for (; k > 0; k >>= 1, now *= now) {
            if (k & 1) ret *= now;
        }
        return ret;
    }

    friend ostream &operator<<(ostream &os, const Mod_Int &p) { return os << p.x; }

    friend istream &operator>>(istream &is, Mod_Int &p) {
        long long a;
        is >> a;
        p = Mod_Int<mod>(a);
        return is;
    }
};

using mint = Mod_Int<MOD>;

void solve() {
    ll H, W, N, K;
    cin >> H >> W >> N >> K;

    vector dp(2 * K, vector(2 * K, mint(0)));
    ll s = (H - K + 1) * (W - K + 1);

    auto get = [&](ll h, ll w) {
        if (dp[h][w] != 0) return dp[h][w];
        ll x = h * w;
        mint ret = mint(s - x).pow(N);
        return dp[h][w] = ret;
    };

    auto calc = [&](ll i, ll j) {
        ll lx = max(0LL, i - K + 1), rx = min(i, H - K);
        ll ly = max(0LL, j - K + 1), ry = min(j, W - K);
        return get(rx - lx + 1, ry - ly + 1);
    };

    mint ans = 0;

    ll lx = K - 1, rx = min(K - 1, H - (K - 1));
    ll ly = K - 1, ry = min(K - 1, W - (K - 1));

    for (ll i = 0; i < lx; i++) {
        for (ll j = 0; j < ly; j++) {
            ans += calc(i, j); //
        }
        for (ll j = 0; j < ry; j++) {
            ans += calc(i, j); //
        }
        if (ly + ry < W) ans += calc(i, K - 1) * mint(W - ly - ry);
    }
    for (ll i = 0; i < rx; i++) {
        for (ll j = 0; j < ly; j++) {
            ans += calc(i, j); //
        }
        for (ll j = 0; j < ry; j++) {
            ans += calc(i, j); //
        }
        if (ly + ry < W) ans += calc(i, K - 1) * mint(W - ly - ry);
    }
    for (ll j = 0; j < ly; j++) {
        if (lx + rx < H) ans += calc(K - 1, j) * mint(H - lx - rx);
    }
    for (ll j = 0; j < ry; j++) {
        if (lx + rx < H) ans += calc(K - 1, j) * mint(H - lx - rx);
    }

    if (lx + rx < H && ly + ry < W) {
        ans += calc(K - 1, K - 1) * mint(H - lx - rx) * mint(W - ly - ry); //
    }

    ans = mint(s).pow(N) * mint(H * W) - ans;
    // cout << ans << ' ';
    cout << ans / mint(s).pow(N) << '\n';
}

int main() {
    int T = 1;
    // cin >> T;
    while (T--) solve();
}
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