結果

問題 No.1607 Kth Maximum Card
ユーザー kaikeykaikey
提出日時 2021-07-16 22:26:56
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 1,795 ms / 3,500 ms
コード長 4,784 bytes
コンパイル時間 2,032 ms
コンパイル使用メモリ 216,080 KB
実行使用メモリ 25,844 KB
最終ジャッジ日時 2024-07-06 09:54:06
合計ジャッジ時間 20,971 ms
ジャッジサーバーID
(参考情報)
judge3 / judge5
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 1 ms
5,248 KB
testcase_01 AC 2 ms
5,376 KB
testcase_02 AC 1 ms
5,376 KB
testcase_03 AC 1 ms
5,376 KB
testcase_04 AC 2 ms
5,376 KB
testcase_05 AC 1 ms
5,376 KB
testcase_06 AC 1 ms
5,376 KB
testcase_07 AC 2 ms
5,376 KB
testcase_08 AC 1,459 ms
25,256 KB
testcase_09 AC 1,064 ms
21,176 KB
testcase_10 AC 1,477 ms
25,260 KB
testcase_11 AC 221 ms
8,496 KB
testcase_12 AC 1,006 ms
20,368 KB
testcase_13 AC 150 ms
6,632 KB
testcase_14 AC 199 ms
7,776 KB
testcase_15 AC 946 ms
20,712 KB
testcase_16 AC 155 ms
7,016 KB
testcase_17 AC 45 ms
5,376 KB
testcase_18 AC 575 ms
15,844 KB
testcase_19 AC 343 ms
11,112 KB
testcase_20 AC 444 ms
13,036 KB
testcase_21 AC 500 ms
14,024 KB
testcase_22 AC 1,238 ms
25,064 KB
testcase_23 AC 1,284 ms
25,064 KB
testcase_24 AC 434 ms
10,740 KB
testcase_25 AC 258 ms
8,012 KB
testcase_26 AC 317 ms
8,884 KB
testcase_27 AC 454 ms
10,852 KB
testcase_28 AC 362 ms
9,580 KB
testcase_29 AC 863 ms
16,892 KB
testcase_30 AC 1,795 ms
25,844 KB
testcase_31 AC 790 ms
15,656 KB
testcase_32 AC 290 ms
18,600 KB
testcase_33 AC 277 ms
18,592 KB
testcase_34 AC 291 ms
18,604 KB
testcase_35 AC 265 ms
18,376 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"
#include <random>
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define SZ(x) ((lint)(x).size())
#define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i)
#define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i)
#define REP(i, n) FOR(i,0,n)
#define IREP(i, n) IFOR(i,0,n)
#define endk '\n'
using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef long double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld;
struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(20); }; } fast_ios_;
template<class T> auto add = [](T a, T b) -> T { return a + b; };
template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); };
template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); };
template<class T> using V = vector<T>;
using Vl = V<lint>; using VVl = V<Vl>;
template< typename T > ostream& operator<<(ostream& os, const vector< T >& v) {
    for (int i = 0; i < (int)v.size(); i++) os << v[i] << (i + 1 != v.size() ? " " : "");
    return os;
}
template< typename T >istream& operator>>(istream& is, vector< T >& v) {
    for (T& in : v) is >> in;
    return is;
}
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }
template <class T>
T div_floor(T a, T b) {
    if (b < 0) a *= -1, b *= -1;
    return a >= 0 ? a / b : (a + 1) / b - 1;
}
template <class T>
T div_ceil(T a, T b) {
    if (b < 0) a *= -1, b *= -1;
    return a > 0 ? (a - 1) / b + 1 : a / b;
}
template <class F> struct rec {
    F f;
    rec(F&& f_) : f(std::forward<F>(f_)) {}
    template <class... Args> auto operator()(Args &&... args) const {
        return f(*this, std::forward<Args>(args)...);
    }
};
lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); }
lint digit(lint a) { return (lint)log10(a); }
lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); }
lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); }
bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => true
void Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); }
const lint MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 1e18;
lint dx[8] = { 0, -1, 0, 1, 1, -1, 1, -1 }, dy[8] = { -1, 0, 1, 0, -1, -1, 1, 1 };
bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endl; return flag; }
struct Edge {
    lint from, to;
    lint cost;
    Edge() {

    }
    Edge(lint u, lint v, lint c) {
        cost = c;
        from = u;
        to = v;
    }
    bool operator<(const Edge& e) const {
        return cost < e.cost;
    }
};
struct WeightedEdge {
    lint to;
    lint cost;
    WeightedEdge(lint v, lint c) {
        to = v;
        cost = c;
    }
    bool operator<(const WeightedEdge& e) const {
        return cost < e.cost;
    }
};
using WeightedGraph = V<V<WeightedEdge>>;
typedef pair<ld, plint> tlint;
typedef pair<plint, plint> qlint;
typedef pair<string, lint> valstr;

Vl Dijkstra(WeightedGraph& g, int s) {
    Vl dist(SZ(g), INF);
    deque<lint> que;
    que.push_back(0);
    dist[s] = 0;
    while (!que.empty()) {
        lint curr = que.front(); que.pop_front();
        for (auto nxt : g[curr]) {
            if (dist[nxt.to] > dist[curr] + nxt.cost) {
                dist[nxt.to] = dist[curr] + nxt.cost;
                if (nxt.cost == 0) que.push_front(nxt.to);
                else que.push_back(nxt.to);
            }
        }
    }
    return dist;
}

int main() {
    lint N, M, K;
    cin >> N >> M >> K;
    V<Edge> es;
    REP(i, M) {
        lint u, v, c;
        cin >> u >> v >> c; u--; v--;
        es.push_back({ u, v, c });
    }

    auto check = [&](lint val) {
        WeightedGraph to(N);
        REP(i, M) {
            if (es[i].cost <= val) {
                to[es[i].to].push_back({ es[i].from, 0 });
                to[es[i].from].push_back({ es[i].to, 0 });
            }
            else {
                to[es[i].to].push_back({ es[i].from, 1 });
                to[es[i].from].push_back({ es[i].to, 1 });
            }
        }
        auto v = Dijkstra(to, 0);
        return v[N - 1] < K;
    };

    lint ng = -1, ok = 1e9 + 1;
    while (ok - ng > 1) {
        lint mid = (ok + ng) / 2;
        if (check(mid)) ok = mid;
        else ng = mid;
    }
    cout << ok << endl;
}
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