結果

問題 No.912 赤黒木
ユーザー SumitacchanSumitacchan
提出日時 2019-10-28 20:48:26
言語 C++14
(gcc 12.3.0 + boost 1.83.0)
結果
AC  
実行時間 434 ms / 3,000 ms
コード長 3,902 bytes
コンパイル時間 2,077 ms
コンパイル使用メモリ 179,896 KB
実行使用メモリ 70,912 KB
最終ジャッジ日時 2024-09-14 21:18:05
合計ジャッジ時間 13,272 ms
ジャッジサーバーID
(参考情報)
judge1 / judge3
このコードへのチャレンジ
(要ログイン)

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 3 ms
5,376 KB
testcase_03 AC 3 ms
5,376 KB
testcase_04 AC 2 ms
5,376 KB
testcase_05 AC 3 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 3 ms
5,376 KB
testcase_12 AC 342 ms
50,944 KB
testcase_13 AC 349 ms
52,480 KB
testcase_14 AC 328 ms
49,408 KB
testcase_15 AC 354 ms
52,608 KB
testcase_16 AC 341 ms
50,816 KB
testcase_17 AC 349 ms
51,328 KB
testcase_18 AC 343 ms
49,664 KB
testcase_19 AC 350 ms
48,640 KB
testcase_20 AC 347 ms
48,128 KB
testcase_21 AC 331 ms
47,872 KB
testcase_22 AC 269 ms
48,360 KB
testcase_23 AC 269 ms
48,504 KB
testcase_24 AC 270 ms
48,504 KB
testcase_25 AC 366 ms
50,944 KB
testcase_26 AC 380 ms
52,480 KB
testcase_27 AC 361 ms
50,304 KB
testcase_28 AC 434 ms
70,912 KB
testcase_29 AC 425 ms
70,656 KB
testcase_30 AC 407 ms
69,592 KB
testcase_31 AC 369 ms
65,620 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>
using namespace std;
/*#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
template<typename T> using gpp_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T, typename L> using gpp_map = tree<T, L, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<typename T> using gpp_multiset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;*/
struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_;
#define FOR(i, begin, end) for(int i=(begin);i<(end);i++)
#define REP(i, n) FOR(i,0,n)
#define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--)
#define IREP(i, n) IFOR(i,0,n)
#define Sort(v) sort(v.begin(), v.end())
#define Reverse(v) reverse(v.begin(), v.end())
#define all(v) v.begin(),v.end()
#define SZ(v) ((int)v.size())
#define Lower_bound(v, x) distance(v.begin(), lower_bound(v.begin(), v.end(), x))
#define Upper_bound(v, x) distance(v.begin(), upper_bound(v.begin(), v.end(), x))
#define Max(a, b) a = max(a, b)
#define Min(a, b) a = min(a, b)
#define bit(n) (1LL<<(n))
#define bit_exist(x, n) ((x >> n) & 1)
#define debug(x) cout << #x << "=" << x << endl;
#define vdebug(v) cout << #v << "=" << endl; REP(i_debug, v.size()){ cout << v[i_debug] << ","; } cout << endl;
#define mdebug(m) cout << #m << "=" << endl; REP(i_debug, m.size()){ REP(j_debug, m[i_debug].size()){ cout << m[i_debug][j_debug] << ","; } cout << endl;}
#define pb push_back
#define f first
#define s second
#define int long long
#define INF 1000000000000000000
template<typename T> istream &operator>>(istream &is, vector<T> &v){ for (auto &x : v) is >> x; return is; }
template<typename T> ostream &operator<<(ostream &os, vector<T> &v){ for(int i = 0; i < v.size(); i++) { cout << v[i]; if(i != v.size() - 1) cout << endl; }; return os; }
template<typename T> void Out(T x) { cout << x << endl; }
template<typename T1, typename T2> void Ans(bool f, T1 y, T2 n) { if(f) Out(y); else Out(n); }

using vec = vector<int>;
using mat = vector<vec>;
using Pii = pair<int, int>;
using PiP = pair<int, Pii>;
using PPi = pair<Pii, int>;
using bools = vector<bool>;
using pairs = vector<Pii>;

//int dx[4] = {1,0,-1,0};
//int dy[4] = {0,1,0,-1};
//char d[4] = {'D','R','U','L'};

const int mod = 1000000007;
//const int mod = 998244353;
//#define Add(x, y) x = (x + (y)) % mod
//#define Mult(x, y) x = (x * (y)) % mod

struct edge{int to, cost, id;};

class Graph
{
public:
    int N;
    vector<vector<edge>> G;

    Graph(int N): N(N){
        G = vector<vector<edge>>(N, vector<edge>(0));
    }

    void add_Directed_edge(int from, int to, int cost = 1, int id = 0){
        G[from].push_back(edge({to, cost, id}));
    }

    void add_Undirected_edge(int v1, int v2, int cost = 1, int id = 0){
        add_Directed_edge(v1, v2, cost, id);
        add_Directed_edge(v2, v1, cost, id);
    }

    vec cnt;
    mat dp;
    void dfs(int v = 0, int p = -1){
        REP(i, cnt[v] + 1) dp[v][i] = 0;
        for(auto e: G[v]) if(e.to != p){
            dfs(e.to, v);
            vec dp0(3, INF);
            REP(i, min(2LL, cnt[v]) + 1) REP(j, min(2LL, cnt[e.to]) + 1){
                if(i + j <= 2) Min(dp0[i + j], dp[v][i] + dp[e.to][j] + (cnt[e.to] - j) % 2);
            }
            cnt[v] += cnt[e.to];
            dp[v].swap(dp0);
        }
    }

};

signed main(){

    int N; cin >> N;
    Graph R(N), B(N);
    REP(i, N - 1){
        int a, b; cin >> a >> b;
        R.add_Undirected_edge(a - 1, b - 1);
    }
    REP(i, N - 1){
        int a, b; cin >> a >> b;
        B.add_Undirected_edge(a - 1, b - 1);
    }

    vec cnt(N);
    REP(i, N) cnt[i] = SZ(B.G[i]) % 2;
    R.cnt = cnt;
    R.dp = mat(N, vec(3, INF));
    R.dfs();
    Out(R.dp[0][2] + N - 1);

    return 0;
}
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