結果

問題 No.2642 Don't cut line!
ユーザー kaikeykaikey
提出日時 2024-02-19 22:19:23
言語 C++17
(gcc 12.3.0 + boost 1.83.0)
結果
WA  
(最新)
AC  
(最初)
実行時間 -
コード長 9,272 bytes
コンパイル時間 3,140 ms
コンパイル使用メモリ 245,184 KB
実行使用メモリ 41,736 KB
最終ジャッジ日時 2024-09-29 03:34:13
合計ジャッジ時間 7,233 ms
ジャッジサーバーID
（参考情報） 		judge1 / 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 WA -
testcase_01 AC 142 ms
40,200 KB
testcase_02 AC 141 ms
40,592 KB
testcase_03 AC 153 ms
41,736 KB
testcase_04 AC 149 ms
41,652 KB
testcase_05 AC 146 ms
41,700 KB
testcase_06 AC 46 ms
8,816 KB
testcase_07 AC 46 ms
7,532 KB
testcase_08 AC 45 ms
8,304 KB
testcase_09 AC 46 ms
8,944 KB
testcase_10 AC 47 ms
8,300 KB
testcase_11 AC 45 ms
8,176 KB
testcase_12 AC 47 ms
7,920 KB
testcase_13 AC 46 ms
7,784 KB
testcase_14 AC 46 ms
8,176 KB
testcase_15 AC 47 ms
8,176 KB
testcase_16 AC 144 ms
41,096 KB
testcase_17 AC 114 ms
35,756 KB
testcase_18 AC 124 ms
37,684 KB
testcase_19 AC 89 ms
29,968 KB
testcase_20 AC 52 ms
14,564 KB
testcase_21 AC 50 ms
9,864 KB
testcase_22 AC 100 ms
32,700 KB
testcase_23 AC 137 ms
41,004 KB
testcase_24 AC 57 ms
19,220 KB
testcase_25 AC 55 ms
17,508 KB
testcase_26 AC 49 ms
10,000 KB
testcase_27 AC 83 ms
26,856 KB
testcase_28 AC 125 ms
37,344 KB
testcase_29 AC 51 ms
13,344 KB
testcase_30 AC 52 ms
15,716 KB
testcase_31 AC 104 ms
32,344 KB
testcase_32 AC 53 ms
14,936 KB
testcase_33 AC 2 ms
6,816 KB
testcase_34 AC 2 ms
6,820 KB
testcase_35 AC 2 ms
6,820 KB
権限があれば一括ダウンロードができます
コンパイルメッセージ
main.cpp: In member function 'void DoublingLowestCommonAncestor::build()':
main.cpp:217:20: warning: overflow in conversion from 'lint' {aka 'long long int'} to 'int' changes value from '20000000000000' to '-1662697472' [-Woverflow]
  217 |         dfs(0, -1, INF, 0);
      |                    ^~~

ソースコード

diff # 

#include "bits/stdc++.h"
#include <random>
#include <chrono>
#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(30); }; } fast_ios_;
template<class T> auto add = [](T a, T b) -> T { return a + b; };
template<class T> auto mul = [](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>; using VVVl = V<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 = 2e13;
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") << endk; 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<lint, plint> tlint;
typedef pair<ld, ld> pld;
typedef pair<plint, plint> qlint;
typedef pair<Edge, lint> pEd;
typedef pair<plint, V<plint>> vVl;
typedef pair<string, string> pstr;
typedef pair<ld, lint> pint;

struct UnionFind {
public:
    UnionFind() : _n(0) {}
    UnionFind(int n) : _n(n), parent_or_size(n, -1) {}

    int merge(int a, int b) {
        assert(0 <= a && a < _n);
        assert(0 <= b && b < _n);
        int x = leader(a), y = leader(b);
        if (x == y) return x;
        if (-parent_or_size[x] < -parent_or_size[y]) std::swap(x, y);
        if (used_count) {
            if (count_in_set[x].size() < count_in_set[y].size()) {
                std::swap(count_in_set[x], count_in_set[y]);
            }
            for (auto p : count_in_set[y]) {
                count_in_set[x][p.first] += p.second;
            }
        }
        if (set_operate) {
            root_values[x] = f(root_values[y], root_values[x]);
        }
        parent_or_size[x] += parent_or_size[y];
        parent_or_size[y] = x;

        return x;
    }

    bool same(int a, int b) {
        assert(0 <= a && a < _n);
        assert(0 <= b && b < _n);
        return leader(a) == leader(b);
    }

    int leader(int a) {
        assert(0 <= a && a < _n);
        if (parent_or_size[a] < 0) return a;
        return parent_or_size[a] = leader(parent_or_size[a]);
    }

    int size(int a) {
        assert(0 <= a && a < _n);
        return -parent_or_size[leader(a)];
    }

    std::vector<std::vector<int>> groups() {
        std::vector<int> leader_buf(_n), group_size(_n);
        for (int i = 0; i < _n; i++) {
            leader_buf[i] = leader(i);
            group_size[leader_buf[i]]++;
        }
        std::vector<std::vector<int>> result(_n);
        for (int i = 0; i < _n; i++) {
            result[i].reserve(group_size[i]);
        }
        for (int i = 0; i < _n; i++) {
            result[leader_buf[i]].push_back(i);
        }
        result.erase(
            std::remove_if(result.begin(), result.end(),
                [&](const std::vector<int>& v) { return v.empty(); }),
            result.end());
        return result;
    }
    //update root calc
    //set by set operations
    void set_operate_and_value(std::vector<lint> array, function<lint(lint, lint)> _f) {
        f = _f;
        root_values = array;
        set_operate = true;
    }
    lint get_set_value(int a) {
        return root_values[leader(a)];
    }

    //regist count
    void regist_count(int a, int label) {
        if (!used_count) {
            used_count = true;
            count_in_set.assign(_n, std::map<int, int>());
        }
        count_in_set[leader(a)][label]++;
    }

    int get_count(int a, int label) {
        if (!used_count) return -1;
        return count_in_set[leader(a)][label];
    }

private:
    int _n;
    std::vector<int> parent_or_size;
    std::vector<std::map<int, int>> count_in_set;
    bool used_count = false;
    std::vector<lint> root_values;
    function<lint(lint, lint)> f;
    bool set_operate = false;
};

struct DoublingLowestCommonAncestor {
    int LOG = 2;
    vector< int > dep;
    const WeightedGraph& g;
    vector< vector< int > > table;
    vector< vector< lint > > table2;

    DoublingLowestCommonAncestor(const WeightedGraph& g) : g(g), dep(g.size()) {
        int curr = 1;
        while (curr < g.size()) {
            curr *= 2;
            LOG++;
        }
        table.assign(LOG, vector< int >(g.size(), -1));
        table2.assign(LOG, vector< lint >(g.size(), INF));
    }

    void dfs(int idx, int par, int w, int d) {
        table[0][idx] = par;
        table2[0][idx] = w;
        dep[idx] = d;
        for (auto& to : g[idx]) {
            if (to.to != par) dfs(to.to, idx, to.cost, d + 1);
        }
    }

    void build() {
        dfs(0, -1, INF, 0);
        for (int k = 0; k + 1 < LOG; k++) {
            for (int i = 0; i < table[k].size(); i++) {
                if (table[k][i] == -1) table[k + 1][i] = -1;
                else table[k + 1][i] = table[k][table[k][i]];
                if (table[k][i] == -1) table2[k + 1][i] = INF;
                else chmin(table2[k + 1][i], table2[k][table[k][i]]);
            }
        }
    }

    int query(int u, int v) {
        lint res = INF;
        if (dep[u] > dep[v]) swap(u, v);
        for (int i = LOG - 1; i >= 0; i--) {
            if (((dep[v] - dep[u]) >> i) & 1) {
                chmin(res, table2[i][v]);
                v = table[i][v];
            }
        }
        if (u == v) return u;
        for (int i = LOG - 1; i >= 0; i--) {
            if (table[i][u] != table[i][v]) {
                chmin(res, table2[i][v]);
                chmin(res, table2[i][u]);
                u = table[i][u];
                v = table[i][v];
            }
        }
        return res;
    }
};

void solve() {
    lint N, K, C;
    cin >> N >> K >> C;
    V<qlint> edges;
    REP(i, K) {
        lint u, v, w, c;
        cin >> u >> v >> w >> c; u--; v--;
        edges.push_back({ {w, -c}, {u, v} });
    }
    sort(ALL(edges));

    lint ans = 0;
    UnionFind tree(N);
    WeightedGraph g(N);
    REP(i, K) {
        auto [p1, p2] = edges[i];
        auto [u, v] = p2;
        if (!tree.same(u, v)) {
            C -= p1.first;
            g[u].push_back({ v, p1.first });
            g[v].push_back({ u, p1.first });
            chmax(ans, -p1.second);
            tree.merge(u, v);
        }
    }

    DoublingLowestCommonAncestor lca(g);
    lca.build();

    REP(i, K) {
        auto [p1, p2] = edges[i];
        auto [u, v] = p2;
        if (-p1.second <= ans) continue;
        if (lca.query(u, v) + C >= p1.first) chmax(ans, -p1.second);
    }
    if (C < 0) ans = -1;
    cout << ans << endl;

}

int main() {
    lint T = 1;
    //cin >> T;
    while (T--) solve();
}
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