結果

問題 No.1170 Never Want to Walk
ユーザー kcvlexkcvlex
提出日時 2020-08-14 22:46:00
言語 C++17
(gcc 13.2.0 + boost 1.83.0)
結果
AC  
実行時間 160 ms / 2,000 ms
コード長 8,553 bytes
コンパイル時間 1,988 ms
コンパイル使用メモリ 153,960 KB
実行使用メモリ 21,888 KB
最終ジャッジ日時 2024-04-18 22:37:21
合計ジャッジ時間 5,933 ms
ジャッジサーバーID
(参考情報)
judge2 / judge1
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
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 2 ms
5,376 KB
testcase_03 AC 2 ms
5,376 KB
testcase_04 AC 2 ms
5,376 KB
testcase_05 AC 2 ms
5,376 KB
testcase_06 AC 2 ms
5,376 KB
testcase_07 AC 2 ms
5,376 KB
testcase_08 AC 2 ms
5,376 KB
testcase_09 AC 2 ms
5,376 KB
testcase_10 AC 2 ms
5,376 KB
testcase_11 AC 2 ms
5,376 KB
testcase_12 AC 2 ms
5,376 KB
testcase_13 AC 2 ms
5,376 KB
testcase_14 AC 2 ms
5,376 KB
testcase_15 AC 2 ms
5,376 KB
testcase_16 AC 2 ms
5,376 KB
testcase_17 AC 2 ms
5,376 KB
testcase_18 AC 2 ms
5,376 KB
testcase_19 AC 2 ms
5,376 KB
testcase_20 AC 3 ms
5,376 KB
testcase_21 AC 2 ms
5,376 KB
testcase_22 AC 2 ms
5,376 KB
testcase_23 AC 2 ms
5,376 KB
testcase_24 AC 3 ms
5,376 KB
testcase_25 AC 2 ms
5,376 KB
testcase_26 AC 2 ms
5,376 KB
testcase_27 AC 135 ms
21,504 KB
testcase_28 AC 133 ms
21,504 KB
testcase_29 AC 135 ms
21,888 KB
testcase_30 AC 137 ms
21,632 KB
testcase_31 AC 134 ms
21,504 KB
testcase_32 AC 152 ms
21,504 KB
testcase_33 AC 160 ms
21,504 KB
testcase_34 AC 154 ms
21,760 KB
testcase_35 AC 158 ms
21,760 KB
testcase_36 AC 152 ms
21,504 KB
testcase_37 AC 154 ms
21,632 KB
testcase_38 AC 155 ms
21,760 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 CPP17
#include <limits>
#include <initializer_list>
#include <utility>
#include <bitset>
#include <tuple>
#include <type_traits>
#include <functional>
#include <string>
#include <array>
#include <deque>
#include <list>
#include <queue>
#include <stack>
#include <vector>
#include <map>
#include <set>
#include <unordered_map>
#include <unordered_set>
#include <iterator>
#include <algorithm>
#include <complex>
#include <random>
#include <numeric>
#include <iostream>
#include <iomanip>
#include <sstream>
#include <regex>
#include <cassert>
#include <cstddef>
#ifdef CPP17
#include <variant>
#endif

#define endl codeforces

#define ALL(v) std::begin(v), std::end(v)
#define ALLR(v) std::rbegin(v), std::rend(v)

using ll = std::int64_t;
using ull = std::uint64_t;
using pii = std::pair<int, int>;
using tii = std::tuple<int, int, int>;
using pll = std::pair<ll, ll>;
using tll = std::tuple<ll, ll, ll>;
using size_type = ssize_t;
template <typename T> using vec = std::vector<T>;
template <typename T> using vvec = vec<vec<T>>;

template <typename T> const T& var_min(const T &t) { return t; }
template <typename T> const T& var_max(const T &t) { return t; }
template <typename T, typename... Tail> const T& var_min(const T &t, const Tail&... tail) { return std::min(t, var_min(tail...)); }
template <typename T, typename... Tail> const T& var_max(const T &t, const Tail&... tail) { return std::max(t, var_max(tail...)); }
template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); }
template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); }

template <typename T, std::size_t Head, std::size_t... Tail> 
struct multi_dim_array { using type = std::array<typename multi_dim_array<T, Tail...>::type, Head>; };

template <typename T, std::size_t Head> 
struct multi_dim_array<T, Head> { using type = std::array<T, Head>; };

template <typename T, std::size_t... Args> using mdarray = typename multi_dim_array<T, Args...>::type;

#ifdef CPP17
template <typename T, typename F, typename... Args> 
void fill_seq(T &t, F f, Args... args) { 
    if constexpr (std::is_invocable<F, Args...>::value) { 
        t = f(args...); 
    } else { 
        for (size_type i = 0; i < t.size(); i++) fill_seq(t[i], f, args..., i); 
    } 
}
#endif

template <typename T> vec<T> make_v(size_type sz) { return vec<T>(sz); }

template <typename T, typename... Tail> 
auto make_v(size_type hs, Tail&&... ts) { 
    auto v = std::move(make_v<T>(std::forward<Tail>(ts)...)); 
    return vec<decltype(v)>(hs, v); 
}

namespace init__ { 
struct InitIO { 
    InitIO() { std::cin.tie(nullptr); std::ios_base::sync_with_stdio(false); std::cout << std::fixed << std::setprecision(30); } 
} init_io; 
}
#define CPP17


namespace tree {

struct UnionFind {
    vec<ll> rank, par;
    vec<ssize_t> sz;

    UnionFind(ll n) : rank(n), par(n), sz(n) {
        init();
    }

    void init() {
        std::fill(ALL(rank), 1);
        std::iota(ALL(par), 0);
        std::fill(ALL(sz), 1);
    }

    ll find(ll n) {
        return (n == par[n] ? n : par[n] = find(par[n]));
    }

    bool unit(ll x, ll y) {
        ll px = find(x), py = find(y);
        if (px == py) return false;
        if (rank[px] < rank[py]) std::swap(px, py);
        par[py] = px;
        rank[px] += (rank[px] == rank[py]);
        sz[px] += sz[py];
        return true;
    }

    bool same(ll x, ll y) {
        return find(x) == find(y);
    }

    ssize_t size(ll n) {
        return sz[find(n)];
    }
};

}

namespace utility {

template <typename T>
using validate_integer = typename std::enable_if<std::is_integral<T>::value, ll>::type;

template <typename T>
auto popcount(T n) -> validate_integer<T> {
    return __builtin_popcountll(n);
}

// 0 indexed
template <typename T>
auto msb(T n) -> validate_integer<T> {
    return 64 - __builtin_clzll(n) - 1;
}

template <typename T>
constexpr auto ceil_pow2(T s) -> validate_integer<T> {
    ll ret = 1;
    while (ret < s) ret *= 2;
    return ret;
}

}

namespace segtree {

template <typename M, typename Op>
class LazySegmentTree {
    struct segment {
        M m;
        Op op;
        bool has_lazy;

        segment(M m = M()) : m(m), op(Op()), has_lazy(false) { }

        void update_op(Op o) {
            m.apply(o);
            op = Op::merge(op, o);
            has_lazy = true;
        }

        void init_op() {
            op = Op();
            has_lazy = false;
        }
    };

    vec<segment> segs;
    size_type height;

    void push(size_type idx) {
        auto &s = segs[idx];
        if (!s.has_lazy) return;
        for (int i = 0; i < 2; i++) {
            auto cidx = 2 * idx + i;
            if (segs.size() <= cidx) break;
            auto &cs = segs[cidx];
            cs.update_op(s.op);
        }
        s.init_op();
    }

    void propagate_from_top(size_type idx) {
        for (int i = height; 1 <= i; i--) push(idx >> i);
    }

    void update_from_bottom(size_type idx) {
        while (true) {
            auto pidx = idx / 2;
            if (pidx == 0) break;
            size_type c0 = 2 * pidx + 0,
                      c1 = 2 * pidx + 1;
            push(c0); push(c1);
            segs[pidx].m = M::merge(segs[c0].m, segs[c1].m);
            idx = pidx;
        }
    }

    size_type get_endpoint_seg(size_type i) {
        i += size();
        return i / (i & -i);
    }

public:
    template <typename F>
    LazySegmentTree(F f, size_type sz) {
        size_type sz2 = utility::ceil_pow2(sz);
        segs.resize(sz2 * 2);
        height = utility::msb(sz2);
        for (size_type i = 0; i < sz; i++) segs[i + sz2] = f(i);
        for (size_type i = sz2 - 1; 1 <= i; i--) segs[i] = M::merge(segs[2 * i].m, segs[2 * i + 1].m);
    }

    template <typename T>
    LazySegmentTree(const vec<T> &v) 
        : LazySegmentTree([&](size_type i) { return v[i]; }, v.size()) { }

    size_type size() const {
        return segs.size() / 2;
    }

    template <typename T>
    void update_query(size_type ql, size_type qr, const T &t) {
        Op op(t);
        auto l0 = get_endpoint_seg(ql);
        auto r0 = get_endpoint_seg(qr);
        propagate_from_top(l0);
        propagate_from_top(r0);
        size_type lnode = ql + size(), rnode = qr + size();
        while (lnode < rnode) {
            if (lnode & 1) {
                segs[lnode].update_op(op);
                push(lnode);
                lnode++;
            }
            if (rnode & 1) {
                rnode--;
                segs[rnode].update_op(op);
                push(rnode);
            }
            lnode /= 2;
            rnode /= 2;
        }
        update_from_bottom(l0);
        update_from_bottom(r0);
    }

    M get_query(ll ql, ll qr) {
        auto ret = M();
        auto l0 = get_endpoint_seg(ql);
        auto r0 = get_endpoint_seg(qr);
        propagate_from_top(l0);
        propagate_from_top(r0);
        size_type lnode = ql + size(), rnode = qr + size();
        while (lnode < rnode) {
            if (lnode & 1) {
                push(lnode);
                ret = M::merge(segs[lnode].m, ret);
                lnode++;
            }
            if (rnode & 1) {
                rnode--;
                push(rnode);
                ret = M::merge(ret, segs[rnode].m);
            }
            lnode /= 2;
            rnode /= 2;
        }
        return ret;
    }
};

}

const ll inf = 5e15;

struct Op {
    ll val;

    Op(ll val = inf) : val(val) { }

    static Op merge(Op a, Op b) {
        return Op(std::min(a.val, b.val));
    }
};

struct M {
    ll val;

    M(ll val = inf) : val(val) { }

    static M merge(M a, M b) {
        return M(std::min(a.val, b.val));
    }

    void apply(Op o) {
        chmin(val, o.val);
    }
};

int main() {
    ll n, a, b;
    std::cin >> n >> a >> b;
    vec<ll> xv(n);
    for (ll &e : xv) std::cin >> e;

    segtree::LazySegmentTree<M, Op> seg([&](ll i) { return M(); }, n);
    tree::UnionFind uf(n);

    for (ll i = 0; i < n; i++) {
        ll e = xv[i];
        ll l = std::distance(xv.begin(), std::lower_bound(ALL(xv), e + a));
        ll r = std::distance(xv.begin(), std::upper_bound(ALL(xv), e + b));
        if (l == r) continue;
        uf.unit(i, l);
        uf.unit(i, r - 1);
        seg.update_query(l, r, i);
    }

    for (ll i = 0; i < n; i++) {
        ll e = seg.get_query(i, i + 1).val;
        if (e != inf) uf.unit(i, e);
    }

    for (ll i = 0; i < n; i++) std::cout << uf.size(i) << "\n";
    return 0;
}
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