結果

問題 No.2328 Build Walls
ユーザー sten_sansten_san
提出日時 2023-05-28 14:58:08
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 158 ms / 3,000 ms
コード長 3,986 bytes
コンパイル時間 2,764 ms
コンパイル使用メモリ 207,624 KB
実行使用メモリ 13,148 KB
最終ジャッジ日時 2023-08-27 11:01:01
合計ジャッジ時間 6,493 ms
ジャッジサーバーID
（参考情報） 		judge13 / judge12
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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
4,376 KB
testcase_01 AC 1 ms
4,376 KB
testcase_02 AC 2 ms
4,380 KB
testcase_03 AC 2 ms
4,376 KB
testcase_04 AC 2 ms
4,376 KB
testcase_05 AC 1 ms
4,376 KB
testcase_06 AC 2 ms
4,376 KB
testcase_07 AC 2 ms
4,376 KB
testcase_08 AC 2 ms
4,380 KB
testcase_09 AC 2 ms
4,376 KB
testcase_10 AC 2 ms
4,380 KB
testcase_11 AC 2 ms
4,376 KB
testcase_12 AC 2 ms
4,376 KB
testcase_13 AC 30 ms
8,284 KB
testcase_14 AC 45 ms
5,608 KB
testcase_15 AC 40 ms
5,660 KB
testcase_16 AC 8 ms
4,376 KB
testcase_17 AC 41 ms
6,508 KB
testcase_18 AC 3 ms
4,376 KB
testcase_19 AC 5 ms
4,380 KB
testcase_20 AC 5 ms
4,380 KB
testcase_21 AC 25 ms
8,060 KB
testcase_22 AC 65 ms
7,100 KB
testcase_23 AC 153 ms
13,136 KB
testcase_24 AC 145 ms
13,076 KB
testcase_25 AC 153 ms
13,028 KB
testcase_26 AC 123 ms
13,000 KB
testcase_27 AC 140 ms
13,120 KB
testcase_28 AC 48 ms
13,040 KB
testcase_29 AC 152 ms
13,016 KB
testcase_30 AC 55 ms
13,008 KB
testcase_31 AC 52 ms
13,124 KB
testcase_32 AC 140 ms
13,024 KB
testcase_33 AC 158 ms
13,148 KB
testcase_34 AC 55 ms
13,036 KB
testcase_35 AC 152 ms
13,060 KB
testcase_36 AC 2 ms
4,380 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;

struct iofast_t {
    iofast_t() {
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} iofast;

struct uns_t {} uns;
template <typename Element, typename Head, typename ...Args>
auto vec(Element init, Head arg, Args ...args) {
    if constexpr (sizeof...(Args) == 0) return vector(arg, init);
    else return vector(arg, vec(init, args...));
}
template <typename Element, typename Head, typename ...Args>
auto vec(uns_t, Head arg, Args ...args) {
    return vec(Element(), arg, args...);
}

template <typename Container>
auto distance(const Container &c, decltype(begin(c)) iter) {
    return distance(begin(c), iter);
}

template <typename RIter, typename Compare = less<typename iterator_traits<RIter>::value_type>>
auto isort(RIter first, RIter last, Compare comp = Compare()) {
    vector<int> i(distance(first, last));
    iota(begin(i), end(i), 0);
    sort(begin(i), end(i), [&](auto x, auto y) {
        return comp(*(first + x), *(first + y));
    });
    return i;
}

template <typename, template <typename> typename, typename = void_t<>>
struct detect : false_type {};
template <typename T, template <typename> typename Check>
struct detect<T, Check, void_t<Check<T>>> : true_type {};
template <typename T, template <typename> typename Check>
constexpr inline bool detect_v = detect<T, Check>::value;

template <typename T>
using has_member_sort = decltype(declval<T>().sort());

template <typename Container, typename Compare = less<typename Container::value_type>>
auto sorted(Container c, Compare comp = Compare()) {
    if constexpr (detect_v<Container, has_member_sort>) {
        c.sort(comp);
        return c;
    }
    else {
        sort(begin(c), end(c), comp);
        return c;
    }
}

template <typename Container, typename Compare = equal_to<typename Container::value_type>>
auto uniqued(Container c, Compare comp = Compare()) {
    c.erase(unique(begin(c), end(c), comp), end(c));
    return c;
}

template <typename T, typename Compare = less<T>>
T &chmin(T &l, T r, Compare &&f = less<T>()) { return l = min(l, r, f); }
template <typename T, typename Compare = less<T>>
T &chmax(T &l, T r, Compare &&f = less<T>()) { return l = max(l, r, f); }

template <typename F>
constexpr auto fix(F &&f) noexcept {
    return [f = std::tuple<F>(std::forward<F>(f))](auto &&...args) mutable {
        return std::get<0>(f)(fix(std::get<0>(f)), std::forward<decltype(args)>(args)...);
    };
}

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

int main() {
    constexpr auto inf = INT64_MAX / 2;

    constexpr int step[8][2] = {
        { -1, -1 }, { 0, -1 }, { 1, -1 }, { -1, 0 }, { -1, 1 }, { 0, 1 }, { 1, 1 }, { 1, 0 },
    };

    int h, w; cin >> h >> w;

    auto a = vec<int64_t>(-1, h, w);
    for (int i = 1; i < h - 1; ++i) {
        for (int j = 0; j < w; ++j) {
            cin >> a[i][j];
        }
    }

    auto dist = vec<int64_t>(inf, h, w);

    pqueue<array<int64_t, 3>> que;

    for (int i = 0; i < h; ++i) {
        if (a[i][0] < 0) {
            continue;
        }
        que.push({ a[i][0], i, 0 });
        dist[i][0] = a[i][0];
    }

    while (!empty(que)) {
        auto [d, y, x] = que.top(); que.pop();

        if (dist[y][x] < d) {
            continue;
        }

        for (auto [dy, dx] : step) {
            int ny = y + dy;
            int nx = x + dx;

            if (min(ny, nx) < 0 || h <= ny || w <= nx) {
                continue;
            }
            if (a[ny][nx] < 0) {
                continue;
            }

            if (dist[ny][nx] <= d + a[ny][nx]) {
                continue;
            }
            dist[ny][nx] = d + a[ny][nx];

            que.push({ dist[ny][nx], ny, nx });
        }
    }

    int64_t ans = inf;
    for (int i = 0; i < h; ++i) {
        chmin(ans, dist[i][w - 1]);
    }

    if (ans != inf) {
        cout << ans << endl;
    }
    else {
        cout << -1 << endl;
    }
}
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