#648829 (C++17) No.1478 Simple Sugoroku

提出ソース

結果

問題	No.1478 Simple Sugoroku
ユーザー	hirono999
提出日時	2021-04-16 22:02:26
言語	C++17 (gcc 12.3.0 + boost 1.83.0)
結果	AC
実行時間	73 ms / 2,000 ms
コード長	4,982 bytes
コンパイル時間	3,006 ms
コンパイル使用メモリ	225,008 KB
実行使用メモリ	9,380 KB
最終ジャッジ日時	2024-07-03 01:49:33
合計ジャッジ時間	6,401 ms
ジャッジサーバーID （参考情報）	judge3 / judge4

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 6,812 KB
testcase_01	AC	2 ms 6,944 KB
testcase_02	AC	2 ms 6,944 KB
testcase_03	AC	2 ms 6,944 KB
testcase_04	AC	2 ms 6,944 KB
testcase_05	AC	2 ms 6,940 KB
testcase_06	AC	2 ms 6,940 KB
testcase_07	AC	2 ms 6,940 KB
testcase_08	AC	1 ms 6,940 KB
testcase_09	AC	1 ms 6,944 KB
testcase_10	AC	2 ms 6,940 KB
testcase_11	AC	2 ms 6,940 KB
testcase_12	AC	2 ms 6,940 KB
testcase_13	AC	71 ms 9,252 KB
testcase_14	AC	69 ms 9,128 KB
testcase_15	AC	69 ms 9,248 KB
testcase_16	AC	69 ms 9,120 KB
testcase_17	AC	71 ms 9,252 KB
testcase_18	AC	69 ms 9,380 KB
testcase_19	AC	69 ms 9,252 KB
testcase_20	AC	73 ms 9,124 KB
testcase_21	AC	69 ms 9,164 KB
testcase_22	AC	68 ms 9,252 KB
testcase_23	AC	70 ms 9,252 KB
testcase_24	AC	73 ms 9,248 KB
testcase_25	AC	70 ms 9,068 KB
testcase_26	AC	68 ms 9,204 KB
testcase_27	AC	69 ms 9,256 KB
testcase_28	AC	72 ms 9,380 KB
testcase_29	AC	72 ms 9,124 KB
testcase_30	AC	72 ms 9,248 KB
testcase_31	AC	69 ms 9,252 KB
testcase_32	AC	68 ms 9,124 KB
testcase_33	AC	67 ms 9,160 KB
testcase_34	AC	70 ms 9,300 KB
testcase_35	AC	69 ms 9,292 KB
testcase_36	AC	70 ms 9,380 KB
testcase_37	AC	69 ms 9,124 KB
testcase_38	AC	68 ms 9,124 KB
testcase_39	AC	67 ms 9,248 KB
testcase_40	AC	67 ms 9,120 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

raw source code

#line 2 "/home/snow/competitive-programming/competitive-programming-library/snow/template.hpp"
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#include <bits/stdc++.h>

constexpr long long INF = 1LL << 60;
constexpr long double PI = 3.141592653589;

#define rep(i, n) for (ll i = 0; i < (n); ++i)
#define rep1(i, n) for (ll i = 1; i <= (n); ++i)
#define rrep(i, n) for (ll i = (n - 1); i >= 0; --i)
#define ALL(obj) (obj).begin(), (obj).end()
#define RALL(obj) (obj).rbegin(), (obj).rend()
#define pb push_back
#define to_s to_string
#define len(v) (ll) v.size()
#define debug(x) cout << #x << ": " << (x) << '\n'

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll, ll> P;
typedef tuple<ll, ll, ll> tpl;

template <typename T = ll>
using vec = vector<T>;

template <typename T = ll>
using vec2 = vector<vector<T>>;

template <typename T = ll>
using vec3 = vector<vector<vector<T>>>;

template < typename T >
inline bool chmax(T &a, const T &b) {
    if (a < b) {
        a = b;
        return 1;
    }
    return 0;
}

template < typename T >
inline bool chmin(T &a, const T &b) {
    if (b < a) {
        a = b;
        return 1;
    }
    return 0;
}
#line 4 "/home/snow/competitive-programming/competitive-programming-library/snow/io/setup.hpp"

namespace snow{

struct IoSetup {
    IoSetup() {
        std::cin.tie(nullptr);
        std::ios::sync_with_stdio(false);
        std::cout << std::fixed << std::setprecision(10);
    }
} iosetup;

}
#line 5 "/home/snow/competitive-programming/competitive-programming-library/snow/io/helper.hpp"

template< typename T1, typename T2 >
std::ostream &operator << (std::ostream &os, const std::pair< T1, T2 > &p) {
    os << p.first << " " << p.second;
    return os;
}

template< typename T1, typename T2 >
std::istream &operator >> (std::istream &is, std::pair< T1, T2 > &p) {
    is >> p.first >> p.second;
    return is;
}

template< typename T1, typename T2, typename T3 >
std::ostream &operator << (std::ostream &os, const std::tuple< T1, T2, T3 > &t) {
    auto &[a, b, c] = t;
    os << a << " " << b << " " << c;
    return os;
}

template< typename T1, typename T2, typename T3 >
std::istream &operator >> (std::istream &is, std::tuple< T1, T2, T3 > &t) {
    auto &[a, b, c] = t;
    is >> a >> b >> c;
    return is;
}

template< typename T >
std::ostream &operator << (std::ostream &os, const std::vector< T > &v){
    for (int i = 0; i < (int)v.size(); ++i) {
        os << v[i] << (i + 1 != v.size() ? " " : "");
    }
    return os;
}

template< typename T >
std::istream &operator >>  (std::istream &is, std::vector< T > &v){
    for(T &in : v) is >> in;
    return is;
}

template< typename T >
std::ostream &operator << (std::ostream &os, const std::set< T > &st){
    int ct = 0;
    for(auto& s : st) os << s << (++ct != st.size() ? " " : "");
    return os;
}

template<class... T>
void input(T&... a){
    (std::cin >> ... >> a);
}

void print() {
    std::cout << '\n';
}
template<class T, class... Ts>
void print(const T& a, const Ts&... b){
    std::cout << a;
    (std::cout << ... << (std::cout << ' ', b));
    std::cout << '\n';
}

int drop() {
    std::cout << '\n';
    exit(0);
}
template<class T, class... Ts>
int drop(const T& a, const Ts&... b){
    std::cout << a;
    (std::cout << ... << (std::cout << ' ', b));
    std::cout << '\n';
    exit(0);
}
#line 4 "main.cpp"
using namespace snow;

// #include "snow/algorithm/binary-search.hpp"

// #include "atcoder/modint"
// using namespace atcoder;
// using mint = modint1000000007;

#line 2 "/home/snow/competitive-programming/competitive-programming-library/snow/algorithm/binary-search.hpp"

namespace snow {

/**
 * @brief Binary Search
 * @param EPS Sepcify if using decimal floating point
 * @return right
 */
template< typename T, typename F >
T binary_search(T left, T right, F f, T EPS = 1) {
    while(abs(right - left) > EPS){
        T mid = (right + left) / 2;
        if(f(mid)) right = mid;
        else left = mid;
    }
    return right;
}

} // namespace snow
#line 13 "main.cpp"

int main() {
    ll N, M;
    cin >> N >> M;
    vec<> B(M);
    cin >> B;

    ld rem = B[0] - 1 + N - B[M - 1];

    //5.333
    auto bi = [&](ld X)->bool {
        vec<ld> f(M);
        auto dp = [&](auto&& self, ll x)->ld {
            if(x == M - 1) return 0;
            ld d = B[x + 1] - B[x];
            f[x] = min(self(self, x + 1) + d, X + 1);
            return f[x];
        };
        dp(dp, 0);

        ld e = 0;
        rep(i, M) e += f[i];
        e /= M;

        return X > e;
    };

    auto ret = snow::binary_search<ld>(0, 1e10, bi, 1e-8);

    ld X = ret;
    vec<ld> f(M);
    auto dp = [&](auto&& self, ll x)->ld {
        if(x == M - 1) return 0;
        ld d = B[x + 1] - B[x];
        f[x] = min(self(self, x + 1) + d, X + 1);
        return f[x];
    };
    dp(dp, 0);

    print(f[0] + rem);

    return 0;
}

yukicoder

結果

テストケース

ソースコード