結果

問題 No.1473 おでぶなおばけさん
ユーザー miscalcmiscalc
提出日時 2021-04-09 22:36:37
言語 C++14
(gcc 13.2.0 + boost 1.83.0)
結果
AC  
実行時間 137 ms / 2,000 ms
コード長 2,767 bytes
コンパイル時間 2,076 ms
コンパイル使用メモリ 185,256 KB
実行使用メモリ 14,612 KB
最終ジャッジ日時 2023-09-07 12:09:05
合計ジャッジ時間 8,467 ms
ジャッジサーバーID
(参考情報)
judge14 / judge11
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 1 ms
4,380 KB
testcase_01 AC 1 ms
4,384 KB
testcase_02 AC 129 ms
13,620 KB
testcase_03 AC 102 ms
11,508 KB
testcase_04 AC 68 ms
9,080 KB
testcase_05 AC 25 ms
5,076 KB
testcase_06 AC 112 ms
11,512 KB
testcase_07 AC 130 ms
14,612 KB
testcase_08 AC 137 ms
14,564 KB
testcase_09 AC 136 ms
14,468 KB
testcase_10 AC 88 ms
5,380 KB
testcase_11 AC 89 ms
5,380 KB
testcase_12 AC 87 ms
5,324 KB
testcase_13 AC 53 ms
4,700 KB
testcase_14 AC 39 ms
4,384 KB
testcase_15 AC 75 ms
5,240 KB
testcase_16 AC 86 ms
5,632 KB
testcase_17 AC 7 ms
4,380 KB
testcase_18 AC 12 ms
4,380 KB
testcase_19 AC 66 ms
5,904 KB
testcase_20 AC 82 ms
10,588 KB
testcase_21 AC 90 ms
8,268 KB
testcase_22 AC 96 ms
12,304 KB
testcase_23 AC 83 ms
11,636 KB
testcase_24 AC 81 ms
10,972 KB
testcase_25 AC 117 ms
11,980 KB
testcase_26 AC 121 ms
12,084 KB
testcase_27 AC 49 ms
5,960 KB
testcase_28 AC 124 ms
14,280 KB
testcase_29 AC 95 ms
8,288 KB
testcase_30 AC 108 ms
9,132 KB
testcase_31 AC 107 ms
14,212 KB
testcase_32 AC 96 ms
11,508 KB
testcase_33 AC 77 ms
10,192 KB
testcase_34 AC 43 ms
7,084 KB
testcase_35 AC 45 ms
6,284 KB
testcase_36 AC 87 ms
8,940 KB
testcase_37 AC 89 ms
10,924 KB
testcase_38 AC 20 ms
4,436 KB
testcase_39 AC 88 ms
5,392 KB
testcase_40 AC 88 ms
5,508 KB
testcase_41 AC 77 ms
5,436 KB
testcase_42 AC 73 ms
5,368 KB
testcase_43 AC 91 ms
10,748 KB
testcase_44 AC 89 ms
10,416 KB
testcase_45 AC 91 ms
10,540 KB
testcase_46 AC 97 ms
10,508 KB
testcase_47 AC 116 ms
12,100 KB
testcase_48 AC 106 ms
11,564 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;
using ll = long long;
using ld = long double;
using pll = pair<ll, ll>;
constexpr ll MOD = 1e9 + 7;
//constexpr ll MOD = 998244353;
//constexpr ll MOD = ;
ll mod(ll A, ll M) {return (A % M + M) % M;}
constexpr ll INF = 1LL << 60;
template<class T> bool chmin(T& a, T b) {if (a > b) {a = b; return true;} return false;}
template<class T> bool chmax(T& a, T b) {if (a < b) {a = b; return true;} return false;}
ll divceil(ll A, ll B) {return (A + (B - 1)) / B;}
#define FINALANS(A) do {cout << (A) << '\n'; exit(0);} while (false)

template <class Abel> class unionfind
{
public:
  vector<ll> parent;
  vector<ll> rank;
  vector<Abel> diffw;

  unionfind(ll N, Abel U = 0)
  {
    parent = vector<ll>(N, -1);
    rank = vector<ll>(N, 0);
    diffw = vector<Abel>(N, U);
  }

  ll root(ll X)
  {
    if (parent.at(X) < 0) return X;
    ll R = root(parent.at(X));
    diffw.at(X) += diffw.at(parent.at(X));
    return parent.at(X) = R;
  }

  ll size(ll X)
  {
    return -parent.at(root(X));
  }

  Abel weight(ll X)
  {
    root(X);
    return diffw.at(X);
  }

  Abel diff(ll X, ll Y)
  {
    return weight(Y) - weight(X);
  }

  bool same(ll X, ll Y)
  {
    return (root(X) == root(Y));
  }

  bool unite(ll X, ll Y, Abel W = 0)
  {
    W += weight(X);
    W -= weight(Y);

    X = root(X);
    Y = root(Y);
    if (X == Y) return false;
    
    if (rank.at(X) < rank.at(Y)) 
    {
      swap(X, Y);
      W = -W;
    }
    if (rank.at(X) == rank.at(Y)) rank.at(X)++;
    parent.at(X) += parent.at(Y);
    parent.at(Y) = X;
    diffw.at(Y) = W;
    return true;
  }
};

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

  using tlll = tuple<ll, ll, ll>;

  vector<tlll> DST(M);
  for (ll i = 0; i < M; i++)
  {
    ll s, t, d;
    cin >> s >> t >> d;
    s--, t--;
    DST.at(i) = make_tuple(d, s, t);
  }

  sort(DST.begin(), DST.end(), greater<tlll>());

  unionfind<ll> uf(N);

  ll maxw = INF;
  for (ll i = 0; i < M; i++)
  {
    ll d = get<0>(DST.at(i)), s = get<1>(DST.at(i)), t = get<2>(DST.at(i));
    if (!uf.same(s, t))
    {
      uf.unite(s, t);
      if (uf.same(0, N - 1))
      {
        maxw = d;
        break;
      }
    }
  }

  cout << maxw << " ";

  vector<vector<ll>> G(N);
  for (ll i = 0; i < M; i++)
  {
    ll d = get<0>(DST.at(i)), s = get<1>(DST.at(i)), t = get<2>(DST.at(i));
    if (maxw <= d)
    {
      G.at(s).push_back(t);
      G.at(t).push_back(s);
    }
  }

  queue<ll> que;
  vector<ll> dist(N, -1);
  que.push(0);
  dist.at(0) = 0;

  while (!que.empty())
  {
    ll v = que.front();
    que.pop();

    for (auto nv : G.at(v))
    {
      if (dist.at(nv) != -1)
        continue;

      dist.at(nv) = dist.at(v) + 1;
      que.push(nv);
    }
  }

  cout << dist.at(N - 1) << endl;
}
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