結果

問題 No.3263 違法な散歩道
ユーザー ont
提出日時 2025-09-06 22:21:36
言語 C++23
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 99 ms / 2,000 ms
コード長 3,402 bytes
コンパイル時間 5,929 ms
コンパイル使用メモリ 335,584 KB
実行使用メモリ 14,848 KB
最終ジャッジ日時 2025-09-06 22:21:46
合計ジャッジ時間 9,450 ms
ジャッジサーバーID
(参考情報)
judge4 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 28
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 <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;
using ld = long double;
using ull = unsigned long long;
template<typename T> using pq = priority_queue<T>;
template<typename T> using pq_g = priority_queue<T, vector<T>, greater<T>>;
using mint = modint998244353;
// using mint = modint1000000007;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(v) (v).begin(), (v).end()
#define rall(v) (v).rbegin(), (v).rend()
#define unique(v) (v).erase(unique(all(v)), (v).end())
#define NP next_permutation
#define endl "\n"
#define debug(x) cerr << #x << " = " << (x) << endl
const int INF = 2e9;
const ll LINF = 2e18;
void Yes(bool a) {cout << (a ? "Yes" : "No") << endl;}
void YES(bool a) {cout << (a ? "YES" : "NO") << endl;}
void Possible(bool a) {cout << (a ? "Possible" : "Impossible") << endl;}
void POSSIBLE(bool a) {cout << (a ? "POSSIBLE" : "IMPOSSIBLE") << endl;}
ll modPow(ll a, ll n, ll mod = LINF) {ll ret = 1; ll x = a % mod; while (n) {if (n & 1) ret = ret * x % mod; x = x * x % mod; n >>= 1;} return ret;}
template<typename T> T floor(T a, T b) {return a / b - (a % b && (a ^ b) < 0);}
template<typename T> T ceil(T a, T b) {return floor(a + b - 1, b);}
template<typename T> void vcin(vector<T> &a) {rep(i, int(a.size())) cin >> a[i];}
template<typename T, typename K> void vcin(vector<T> &a, vector<K> &b) {rep(i, int(a.size())) cin >> a[i] >> b[i];}
template<typename T> void vcout(vector<T> &a) {rep(i, int(a.size())) {cout << a[i] << " ";} cout << endl;}
template<typename T> void vcin(vector<vector<T>> &a) {rep(i, int(a.size())) rep(j, (int)a[i].size()) cin >> a[i][j];}
template<typename T> void vcout(vector<vector<T>> &a) {rep(i, int(a.size())) {rep(j, int(a[i].size())) {cout << a[i][j] << " ";} cout << endl;} cout << endl;}
template<typename T> auto vmin(vector<T> &a) {return *min_element(all(a));}
template<typename T> auto vmax(vector<T> &a) {return *max_element(all(a));}
template<typename T> auto vsum(vector<T> a) {return accumulate(all(a), T(0));}
template<typename T> bool chmin(T &a, T b){if(a > b){a = b; return true;} return false;}
template<typename T> bool chmax(T &a, T b){if(a < b){a = b; return true;} return false;}

void cincout() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout << fixed << setprecision(15);
}
 
int main() {
    cincout();

    int N, M;
    cin >> N >> M;
    vector<vector<int>> G(N);
    vector<bool> exist(N);
    for (int i = 0; i < M; i++) {
        int u, v;
        cin >> u >> v;
        u--, v--;
        G[u].push_back(v);
        G[v].push_back(u);
    }

    int K; 
    cin >> K;
    for (int i = 0; i < K; i++) {
        int A;
        cin >> A;
        A--;
        exist[A] = true;
    }

    vector<vector<int>> dist(N, vector<int>(5, INF));
    dist[0][0] = 0;
    queue<pair<int, int>> q;
    q.push({0, 0});

    while (!q.empty()) {
        auto [v, cnt] = q.front();
        q.pop();
        
        for (int &next_v : G[v]) {
            if (exist[next_v]) {
                if (cnt == 4) continue;
                if (chmin(dist[next_v][cnt + 1], dist[v][cnt] + 1)) q.push({next_v, cnt + 1});
            }

            else {
                if (chmin(dist[next_v][0], dist[v][cnt] + 1)) q.push({next_v, 0});
            }
        }
    }

    int ans = vmin(dist[N - 1]);
    cout << (ans != INF ? ans : -1) << endl;
}
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