結果

問題 No.1928 Make a Binary Tree
ユーザー hitonanodehitonanode
提出日時 2022-05-06 23:07:03
言語 C++23
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 133 ms / 3,000 ms
コード長 6,279 bytes
コンパイル時間 1,772 ms
コンパイル使用メモリ 182,508 KB
実行使用メモリ 54,772 KB
最終ジャッジ日時 2024-07-06 01:38:09
合計ジャッジ時間 7,383 ms
ジャッジサーバーID
(参考情報)
judge5 / judge2
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 2 ms
5,376 KB
testcase_03 AC 1 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 1 ms
5,376 KB
testcase_09 AC 1 ms
5,376 KB
testcase_10 AC 2 ms
5,376 KB
testcase_11 AC 1 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 6 ms
5,376 KB
testcase_16 AC 5 ms
5,376 KB
testcase_17 AC 4 ms
5,376 KB
testcase_18 AC 5 ms
5,376 KB
testcase_19 AC 2 ms
5,376 KB
testcase_20 AC 4 ms
5,376 KB
testcase_21 AC 3 ms
5,376 KB
testcase_22 AC 5 ms
5,376 KB
testcase_23 AC 3 ms
5,376 KB
testcase_24 AC 5 ms
5,376 KB
testcase_25 AC 6 ms
5,376 KB
testcase_26 AC 109 ms
16,232 KB
testcase_27 AC 60 ms
11,136 KB
testcase_28 AC 66 ms
11,392 KB
testcase_29 AC 131 ms
18,172 KB
testcase_30 AC 56 ms
10,240 KB
testcase_31 AC 77 ms
12,800 KB
testcase_32 AC 121 ms
16,896 KB
testcase_33 AC 62 ms
11,008 KB
testcase_34 AC 80 ms
12,928 KB
testcase_35 AC 65 ms
14,464 KB
testcase_36 AC 105 ms
48,768 KB
testcase_37 AC 112 ms
18,936 KB
testcase_38 AC 2 ms
5,376 KB
testcase_39 AC 109 ms
36,352 KB
testcase_40 AC 109 ms
36,468 KB
testcase_41 AC 107 ms
36,224 KB
testcase_42 AC 110 ms
36,352 KB
testcase_43 AC 108 ms
36,208 KB
testcase_44 AC 109 ms
36,608 KB
testcase_45 AC 109 ms
36,224 KB
testcase_46 AC 108 ms
36,224 KB
testcase_47 AC 108 ms
36,088 KB
testcase_48 AC 108 ms
35,824 KB
testcase_49 AC 98 ms
54,772 KB
testcase_50 AC 103 ms
14,184 KB
testcase_51 AC 103 ms
14,196 KB
testcase_52 AC 99 ms
14,132 KB
testcase_53 AC 100 ms
14,168 KB
testcase_54 AC 102 ms
14,196 KB
testcase_55 AC 93 ms
45,380 KB
testcase_56 AC 131 ms
17,600 KB
testcase_57 AC 129 ms
17,280 KB
testcase_58 AC 133 ms
17,916 KB
testcase_59 AC 117 ms
42,936 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 <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <chrono>
#include <cmath>
#include <complex>
#include <deque>
#include <forward_list>
#include <fstream>
#include <functional>
#include <iomanip>
#include <ios>
#include <iostream>
#include <limits>
#include <list>
#include <map>
#include <numeric>
#include <queue>
#include <random>
#include <set>
#include <sstream>
#include <stack>
#include <string>
#include <tuple>
#include <type_traits>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
using namespace std;
using lint = long long;
using pint = pair<int, int>;
using plint = pair<lint, lint>;
struct fast_ios { fast_ios(){ cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(20); }; } fast_ios_;
#define ALL(x) (x).begin(), (x).end()
#define FOR(i, begin, end) for(int i=(begin),i##_end_=(end);i<i##_end_;i++)
#define IFOR(i, begin, end) for(int 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)
template <typename T, typename V>
void ndarray(vector<T>& vec, const V& val, int len) { vec.assign(len, val); }
template <typename T, typename V, typename... Args> void ndarray(vector<T>& vec, const V& val, int len, Args... args) { vec.resize(len), for_each(begin(vec), end(vec), [&](T& v) { ndarray(v, val, args...); }); }
template <typename T> bool chmax(T &m, const T q) { return m < q ? (m = q, true) : false; }
template <typename T> bool chmin(T &m, const T q) { return m > q ? (m = q, true) : false; }
int floor_lg(long long x) { return x <= 0 ? -1 : 63 - __builtin_clzll(x); }
template <typename T1, typename T2> pair<T1, T2> operator+(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first + r.first, l.second + r.second); }
template <typename T1, typename T2> pair<T1, T2> operator-(const pair<T1, T2> &l, const pair<T1, T2> &r) { return make_pair(l.first - r.first, l.second - r.second); }
template <typename T> vector<T> sort_unique(vector<T> vec) { sort(vec.begin(), vec.end()), vec.erase(unique(vec.begin(), vec.end()), vec.end()); return vec; }
template <typename T> int arglb(const std::vector<T> &v, const T &x) { return std::distance(v.begin(), std::lower_bound(v.begin(), v.end(), x)); }
template <typename T> int argub(const std::vector<T> &v, const T &x) { return std::distance(v.begin(), std::upper_bound(v.begin(), v.end(), x)); }
template <typename T> istream &operator>>(istream &is, vector<T> &vec) { for (auto &v : vec) is >> v; return is; }
template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec) { os << '['; for (auto v : vec) os << v << ','; os << ']'; return os; }
template <typename T, size_t sz> ostream &operator<<(ostream &os, const array<T, sz> &arr) { os << '['; for (auto v : arr) os << v << ','; os << ']'; return os; }
#if __cplusplus >= 201703L
template <typename... T> istream &operator>>(istream &is, tuple<T...> &tpl) { std::apply([&is](auto &&... args) { ((is >> args), ...);}, tpl); return is; }
template <typename... T> ostream &operator<<(ostream &os, const tuple<T...> &tpl) { os << '('; std::apply([&os](auto &&... args) { ((os << args << ','), ...);}, tpl); return os << ')'; }
#endif
template <typename T> ostream &operator<<(ostream &os, const deque<T> &vec) { os << "deq["; for (auto v : vec) os << v << ','; os << ']'; return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T, typename TH> ostream &operator<<(ostream &os, const unordered_set<T, TH> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T> ostream &operator<<(ostream &os, const unordered_multiset<T> &vec) { os << '{'; for (auto v : vec) os << v << ','; os << '}'; return os; }
template <typename T1, typename T2> ostream &operator<<(ostream &os, const pair<T1, T2> &pa) { os << '(' << pa.first << ',' << pa.second << ')'; return os; }
template <typename TK, typename TV> ostream &operator<<(ostream &os, const map<TK, TV> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
template <typename TK, typename TV, typename TH> ostream &operator<<(ostream &os, const unordered_map<TK, TV, TH> &mp) { os << '{'; for (auto v : mp) os << v.first << "=>" << v.second << ','; os << '}'; return os; }
#ifdef HITONANODE_LOCAL
const string COLOR_RESET = "\033[0m", BRIGHT_GREEN = "\033[1;32m", BRIGHT_RED = "\033[1;31m", BRIGHT_CYAN = "\033[1;36m", NORMAL_CROSSED = "\033[0;9;37m", RED_BACKGROUND = "\033[1;41m", NORMAL_FAINT = "\033[0;2m";
#define dbg(x) cerr << BRIGHT_CYAN << #x << COLOR_RESET << " = " << (x) << NORMAL_FAINT << " (L" << __LINE__ << ") " << __FILE__ << COLOR_RESET << endl
#define dbgif(cond, x) ((cond) ? cerr << BRIGHT_CYAN << #x << COLOR_RESET << " = " << (x) << NORMAL_FAINT << " (L" << __LINE__ << ") " << __FILE__ << COLOR_RESET << endl : cerr)
#else
#define dbg(x) 0
#define dbgif(cond, x) 0
#endif

int main() {
    int N;
    cin >> N;
    vector<vector<int>> to(N);
    REP(e, N - 1) {
        int s, t;
        cin >> s >> t;
        --s, --t;
        to[s].push_back(t), to[t].push_back(s);
    }
    auto rec = [&](auto &&self, int now, int prv) -> multiset<int> {
        vector<multiset<int>> chs;
        for (auto nxt : to[now]) {
            if (nxt != prv) {
                chs.emplace_back(self(self, nxt, now));
            }
        }
        if (chs.empty()) return {1};
        int d = 0;
        FOR(e, 1, chs.size()) if (chs[e].size() > chs[d].size()) {
            d = e;
        }
        REP(e, chs.size()) {
            if (d == e) continue;
            chs[d].insert(chs[e].begin(), chs[e].end());
        }
        int tgt = 1;
        REP(_, 2) {
            if (chs[d].size()) {
                auto itr = prev(chs[d].end());
                tgt += *itr;
                chs[d].erase(itr);
            }
        }
        chs[d].insert(tgt);
        return move(chs[d]);
    };

    auto ret = rec(rec, 0, -1);
    cout << *prev(ret.end()) << endl;
}
0