結果

問題 No.2731 Two Colors
ユーザー torisasami4torisasami4
提出日時 2024-04-19 21:33:36
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 251 ms / 3,000 ms
コード長 6,513 bytes
コンパイル時間 2,133 ms
コンパイル使用メモリ 208,404 KB
実行使用メモリ 11,536 KB
最終ジャッジ日時 2024-04-19 21:34:05
合計ジャッジ時間 5,916 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
(要ログイン)

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 251 ms
11,008 KB
testcase_01 AC 241 ms
11,264 KB
testcase_02 AC 243 ms
11,264 KB
testcase_03 AC 3 ms
6,940 KB
testcase_04 AC 9 ms
6,940 KB
testcase_05 AC 7 ms
6,940 KB
testcase_06 AC 25 ms
6,944 KB
testcase_07 AC 27 ms
6,944 KB
testcase_08 AC 5 ms
6,940 KB
testcase_09 AC 96 ms
9,596 KB
testcase_10 AC 3 ms
6,944 KB
testcase_11 AC 115 ms
11,536 KB
testcase_12 AC 98 ms
9,448 KB
testcase_13 AC 88 ms
9,272 KB
testcase_14 AC 42 ms
6,944 KB
testcase_15 AC 6 ms
6,944 KB
testcase_16 AC 44 ms
6,944 KB
testcase_17 AC 57 ms
7,264 KB
testcase_18 AC 12 ms
6,944 KB
testcase_19 AC 45 ms
6,944 KB
testcase_20 AC 61 ms
7,484 KB
testcase_21 AC 13 ms
6,944 KB
testcase_22 AC 102 ms
10,152 KB
testcase_23 AC 27 ms
6,944 KB
testcase_24 AC 14 ms
6,940 KB
testcase_25 AC 2 ms
6,940 KB
testcase_26 AC 80 ms
8,452 KB
testcase_27 AC 103 ms
10,360 KB
testcase_28 AC 68 ms
8,192 KB
testcase_29 AC 23 ms
6,940 KB
testcase_30 AC 38 ms
6,944 KB
testcase_31 AC 27 ms
6,944 KB
testcase_32 AC 132 ms
11,500 KB
testcase_33 AC 2 ms
6,940 KB
testcase_34 AC 2 ms
6,940 KB
testcase_35 AC 1 ms
6,944 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 #

// #define _GLIBCXX_DEBUG
// #pragma GCC optimize("O2,unroll-loops")
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < int(n); i++)
#define per(i, n) for (int i = (n)-1; 0 <= i; i--)
#define rep2(i, l, r) for (int i = (l); i < int(r); i++)
#define per2(i, l, r) for (int i = (r)-1; int(l) <= i; 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()
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';
}
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
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 <class T>
using minheap = std::priority_queue<T, std::vector<T>, std::greater<T>>;
template <class T>
using maxheap = std::priority_queue<T>;
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));
}

// __int128_t gcd(__int128_t a, __int128_t b) {
//     if (a == 0)
//         return b;
//     if (b == 0)
//         return a;
//     __int128_t cnt = a % b;
//     while (cnt != 0) {
//         a = b;
//         b = cnt;
//         cnt = a % b;
//     }
//     return b;
// }

struct Union_Find_Tree {
    vector<int> data;
    const int n;
    int cnt;

    Union_Find_Tree(int n) : data(n, -1), n(n), cnt(n) {}

    int root(int x) {
        if (data[x] < 0) return x;
        return data[x] = root(data[x]);
    }

    int operator[](int i) { return root(i); }

    bool unite(int x, int y) {
        x = root(x), y = root(y);
        if (x == y) return false;
        // if (data[x] > data[y]) swap(x, y);
        data[x] += data[y], data[y] = x;
        cnt--;
        return true;
    }

    int size(int x) { return -data[root(x)]; }

    int count() { return cnt; };

    bool same(int x, int y) { return root(x) == root(y); }

    void clear() {
        cnt = n;
        fill(begin(data), end(data), -1);
    }
};

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;
    }
};

ll mpow(ll x, ll n, ll mod) {
    ll ans = 1;
    x %= mod;
    while (n != 0) {
        if (n & 1) ans = ans * x % mod;
        x = x * x % mod;
        n = n >> 1;
    }
    ans %= mod;
    return ans;
}

template <typename T>
T modinv(T a, const T &m) {
    T b = m, u = 1, v = 0;
    while (b > 0) {
        T t = a / b;
        swap(a -= t * b, b);
        swap(u -= t * v, v);
    }
    return u >= 0 ? u % m : (m - (-u) % m) % m;
}

ll divide_int(ll a, ll b) {
    if (b < 0) a = -a, b = -b;
    return (a >= 0 ? a / b : (a - b + 1) / b);
}

// const int MOD = 1000000007;
const int MOD = 998244353;
using mint = Mod_Int<MOD>;

// ----- library -------
// ----- library -------

int main() {
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    cout << fixed << setprecision(15);

    int h, w;
    cin >> h >> w;
    vector<vector<int>> a(h, vector<int>(w));
    rep(i, h) rep(j, w) cin >> a[i][j];
    vector<minheap<pair<int, pii>>> que(2);
    int dx[] = {1, -1, 0, 0}, dy[] = {0, 0, 1, -1};
    vector<vector<int>> b = a;
    rep(i, h) rep(j, w) b[i][j] = -1;
    b[0][0] = 0, b[h - 1][w - 1] = 1;
    bool f = false;
    auto upd = [&](int i, int j) {
        rep(dir, 4) {
            int ni = i + dx[dir], nj = j + dy[dir];
            if (ni < 0 || h <= ni || nj < 0 || w <= nj)
                continue;
            if (b[ni][nj] == -1)
                que[b[i][j]].emplace(a[ni][nj], pair(ni, nj));
            else if (b[ni][nj] != b[i][j])
                f = true;
        }
    };
    upd(0, 0), upd(h - 1, w - 1);
    int ans = 0;
    rep(t, h * w) {
        if (f)
            break;
        int m = t % 2;
        while (sz(que[m])) {
            auto [val, ij] = que[m].top();
            auto [i, j] = ij;
            que[m].pop();
            if (b[i][j] != -1)
                continue;
            b[i][j] = m;
            upd(i, j);
            ans++;
            break;
        }
    }
    cout << ans << endl;
}
0