#393697 (C++17) No.918 LISGRID

提出ソース
結果

問題	No.918 LISGRID
コンテスト
ユーザー	Pachicobue
提出日時	2019-10-25 23:23:38
言語	C++17 (gcc 13.3.0 + boost 1.87.0)
結果	AC
実行時間	74 ms / 2,000 ms
コード長	7,406 bytes
コンパイル時間	2,087 ms
コンパイル使用メモリ	208,392 KB
最終ジャッジ日時	2025-01-08 01:47:24
ジャッジサーバーID （参考情報）	judge4 / judge3
このコードへのチャレンジ
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ファイルパターン	結果
sample	AC * 3
other	AC * 36
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

raw source code
#include <bits/stdc++.h>
#pragma GCC diagnostic ignored "-Wsign-compare"
#pragma GCC diagnostic ignored "-Wsign-conversion"

#define NDEBUG
using i32 = int32_t;
using i64 = int64_t;
using u32 = uint32_t;
using u64 = uint64_t;
using uint = unsigned int;
using usize = std::size_t;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
template<typename T> constexpr T popcount(const T u) { return u ? static_cast<T>(__builtin_popcountll(static_cast<u64>(u))) : static_cast<T>(0); }
template<typename T> constexpr T log2p1(const T u) { return u ? static_cast<T>(64 - __builtin_clzll(static_cast<u64>(u))) : static_cast<T>(0); }
template<typename T> constexpr T msbp1(const T u) { return log2p1(u); }
template<typename T> constexpr T lsbp1(const T u) { return __builtin_ffsll(u); }
template<typename T> constexpr T clog(const T u) { return u ? log2p1(u - 1) : static_cast<T>(u); }
template<typename T> constexpr bool ispow2(const T u) { return u and (static_cast<u64>(u) & static_cast<u64>(u - 1)) == 0; }
template<typename T> constexpr T ceil2(const T u) { return static_cast<T>(1) << clog(u); }
template<typename T> constexpr T floor2(const T u) { return u == 0 ? static_cast<T>(0) : static_cast<T>(1) << (log2p1(u) - 1); }
template<typename T> constexpr bool btest(const T mask, const usize ind) { return ((static_cast<u64>(mask) >> ind) & static_cast<u64>(1)); }
template<typename T> constexpr T bcut(const T mask, const usize ind) { return ind == 0 ? static_cast<T>(0) : static_cast<T>((static_cast<u64>(mask) << (64 - ind)) >> (64 - ind)); }
template<typename T> bool chmin(T& a, const T& b) { return (a > b ? a = b, true : false); }
template<typename T> bool chmax(T& a, const T& b) { return (a < b ? a = b, true : false); }
constexpr unsigned int mod                  = 1000000007;
template<typename T> constexpr T inf_v      = std::numeric_limits<T>::max() / 4;
template<typename Real> constexpr Real pi_v = Real{3.141592653589793238462643383279502884};
template<typename T>
T read()
{
    T v;
    return std::cin >> v, v;
}
template<typename T>
std::vector<T> read_vec(const std::size_t size)
{
    std::vector<T> v(size);
    for (auto& e : v) { std::cin >> e; }
    return v;
}
template<typename... Types>
auto read_vals() { return std::tuple<std::decay_t<Types>...>{read<Types>()...}; }
#define SHOW(...) static_cast<void>(0)
template<typename T>
std::vector<T> make_v(const std::size_t size, T v) { return std::vector<T>(size, v); }
template<class... Args>
auto make_v(const std::size_t size, Args... args) { return std::vector<decltype(make_v(args...))>(size, make_v(args...)); }


template<typename Cost>
class base_graph
{
public:
    using cost_type = Cost;
    base_graph(const usize sz) : sz{sz}, edges(sz), rev_edges(sz) {}
    void add_edge(const usize from, const usize to, const Cost cost, const bool bi = false)
    {
        assert(from < sz), assert(to < sz);
        edges[from].push_back(edge{from, to, cost}), rev_edges[to].push_back(edge(to, from, cost));
        if (bi) { add_edge(to, from, cost, false); }
    }
    struct edge
    {
        edge(const usize from, const usize to, const Cost cost) : from{from}, to{to}, cost{cost} {}
        usize from, to;
        Cost cost;
        bool operator<(const edge& e) const { return cost != e.cost ? cost < e.cost : to < e.to; }
    };
    std::vector<edge>& operator[](const usize i) { return assert(i < sz), edges[i]; }
    const std::vector<edge>& operator[](const usize i) const { return assert(i < sz), edges[i]; }
    const std::vector<std::vector<edge>>& rev_edge() const { return rev_edges; }
    std::vector<std::vector<edge>>& rev_edge() { return rev_edges; }
    friend std::ostream& operator<<(std::ostream& os, const base_graph& g)
    {
        os << "[\n";
        for (usize i = 0; i < g.sz; i++) {
            for (const auto& e : g.edges[i]) { os << i << "->" << e.to << ":" << e.cost << "\n"; }
        }
        return (os << "]\n");
    }
    static usize to(const edge& e) { return e.to; }
    usize size() const { return sz; }

private:
    const usize sz;
    std::vector<std::vector<edge>> edges, rev_edges;
};
template<>
class base_graph<void>
{
public:
    base_graph(const usize sz) : sz{sz}, edges(sz), rev_edges(sz) {}
    void add_edge(const usize from, const usize to, const bool bi = false)
    {
        assert(from < sz), assert(to < sz);
        edges[from].push_back(to), rev_edges[to].push_back(from);
        if (bi) { add_edge(to, from, false); }
    }
    std::vector<usize>& operator[](const usize i) { return assert(i < sz), edges[i]; }
    const std::vector<usize>& operator[](const usize i) const { return assert(i < sz), edges[i]; }
    const std::vector<std::vector<usize>>& rev_edge() const { return rev_edges; }
    std::vector<std::vector<usize>>& rev_edge() { return rev_edges; }
    friend std::ostream& operator<<(std::ostream& os, const base_graph& g)
    {
        os << "[\n";
        for (usize i = 0; i < g.sz; i++) {
            for (const usize to : g.edges[i]) { os << i << "->" << to << "\n"; }
        }
        return (os << "]\n");
    }
    static usize to(const usize e) { return e; }
    usize size() const { return sz; }

private:
    const usize sz;
    std::vector<std::vector<usize>> edges, rev_edges;
};
using graph = base_graph<void>;
using tree  = graph;
template<typename Cost>
using cost_graph = base_graph<Cost>;
template<typename Cost>
using cost_tree = cost_graph<Cost>;
template<typename Cost>
std::pair<bool, std::vector<usize>> top_sort(const base_graph<Cost>& g)
{
    const usize v = g.size();
    std::vector<usize> srt, used(v, 0);
    auto dfs = [&](auto&& self, const usize s) -> bool {
        if (used[s] == 1) {
            return false;
        } else if (used[s] == 0) {
            used[s] = 1;
            for (const auto& e : g[s]) {
                const usize to = base_graph<Cost>::to(e);
                if (not self(self, to)) { return false; }
            }
            used[s] = 2, srt.push_back(s);
        }
        return true;
    };
    for (usize i = 0; i < v; i++) {
        if (not dfs(dfs, i)) { return {false, srt}; }
    }
    std::reverse(srt.begin(), srt.end());
    return {true, srt};
}
int main()
{
    const auto [h, w] = read_vals<usize, usize>();
    auto a = read_vec<usize>(h), b = read_vec<usize>(w);
    std::sort(a.begin(), a.end()), std::sort(b.begin(), b.end());
    graph g(h * w);
    for (usize i = 0; i < h; i++) {
        for (usize j = 0; j + 1 < w; j++) {
            const usize s = i * w + j, t = i * w + j + 1;
            if (j + 1 < a[i]) {
                g.add_edge(s, t);
            } else {
                g.add_edge(t, s);
            }
        }
    }
    for (usize j = 0; j < w; j++) {
        for (usize i = 0; i + 1 < h; i++) {
            const usize s = i * w + j, t = (i + 1) * w + j;
            if (i + 1 < b[j]) {
                g.add_edge(s, t);
            } else {
                g.add_edge(t, s);
            }
        }
    }
    const auto res = top_sort(g);
    assert(res.first);
    const auto ord = res.second;
    auto ans       = make_v(h, w, 0UL);
    for (usize i = 0; i < h * w; i++) {
        const usize p     = ord[i];
        ans[p / w][p % w] = i + 1;
    }
    for (usize i = 0; i < h; i++) {
        for (usize j = 0; j < w; j++) { std::cout << ans[i][j] << " "; }
        std::cout << std::endl;
    }
    return 0;
}
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結果

ソースコード
