結果
| 問題 |
No.3263 違法な散歩道
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2025-09-06 14:15:07 |
| 言語 | C++17(clang) (17.0.6 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 287 ms / 2,000 ms |
| コード長 | 3,050 bytes |
| コンパイル時間 | 3,005 ms |
| コンパイル使用メモリ | 177,364 KB |
| 実行使用メモリ | 48,764 KB |
| 最終ジャッジ日時 | 2025-09-06 14:15:18 |
| 合計ジャッジ時間 | 8,209 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge1 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 28 |
コンパイルメッセージ
main.cpp:68:19: warning: variable length arrays in C++ are a Clang extension [-Wvla-cxx-extension]
68 | vector<PLL> G[N][5];
| ^
main.cpp:68:19: note: read of non-const variable 'N' is not allowed in a constant expression
main.cpp:54:8: note: declared here
54 | ll N,M; cin >> N >> M;
| ^
1 warning generated.
ソースコード
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define ld long double
using LL = long long; using ULL = unsigned long long;
using VI = vector<int>; using VVI = vector<VI>; using VVVI = vector<VVI>;
using VL = vector<LL>; using VVL = vector<VL>; using VVVL = vector<VVL>;
using VB = vector<bool>; using VVB = vector<VB>; using VVVB = vector<VVB>;
using VD = vector<double>; using VVD = vector<VD>; using VVVD = vector<VVD>;
using VC = vector<char>; using VS = vector<string>; using VVC = vector<VC>;
using PII = pair<int,int>; using PLL = pair<LL,LL>; using PDD = pair<double,double>; using PIL = pair<int,LL>;
using MII = map<int,int>; using MLL = map<LL,LL>;
using SI = set<int>; using SL = set<LL>;
using MSI = multiset<int>; using MSL = multiset<LL>;
template<class T> using MAXPQ = priority_queue<T>;
template<class T> using MINPQ = priority_queue< T, vector<T>, greater<T> >;
const ll MOD = 1000000007;
const ll MOD2 = 998244353;
const ll INF = 1LL << 60;
#define PI 3.14159265358979323846
#define FOR(i, a, b) for(int i = (a); i < (b); ++i)
#define REP(i, n) FOR(i, 0, n)
#define EACH(e, v) for(auto &e : v)
#define RITR(it, v) for(auto it = (v).rbegin(); it != (v).rend(); ++it)
#define ALL(v) v.begin(),v.end()
vector<ll> x8={1,1,1,0,0,-1,-1,-1},y8={1,0,-1,1,-1,1,0,-1};
int dx4[4]={1,-1,0,0}, dy4[4]={0,0,1,-1};
/*
memo
-uf,RMQ(segtree),BIT,BIT2,SegTree,SegTreeLazy
-isprime,Eratosthenes,gcdlcm,factorize,divisors,modpow,moddiv
nCr(+modnCr,inverse,extend_euclid.powmod),tobaseB,tobase10
-dijkstra,Floyd,bellmanford,sccd,topological,treediamiter
-compress1,compress2,rotate90
-co,ci,fo1,fo2,fo3,fo4
-bitsearch,binaryserach
-bfs
-SegTreedec,SegTreeLazydec
*/
int main(){
cin.tie(0);
ios_base::sync_with_stdio(0);
ll N,M; cin >> N >> M;
VL u(M),v(M);
for(ll i = 0; i < M; i++){
cin >> u[i] >> v[i];
u[i]--,v[i]--;
}
set<ll> iwi;
ll K; cin >> K;
for(ll i = 0; i < K; i++){
ll a; cin >> a;
iwi.insert(--a);
}
vector<PLL> G[N][5];
for(ll i = 0; i < M; i++){
if(iwi.count(v[i])){
for(ll j = 0; j+1 < 5; j++){
G[u[i]][j].push_back({v[i],j+1});
}
}
else{
for(ll j = 0; j < 5; j++){
G[u[i]][j].push_back({v[i],0});
}
}
if(iwi.count(u[i])){
for(ll j = 0; j+1 < 5; j++){
G[v[i]][j].push_back({u[i],j+1});
}
}
else{
for(ll j = 0; j < 5; j++){
G[v[i]][j].push_back({u[i],0});
}
}
}
VVL d(N,VL(5,INF));
d[0][0] = 0;
queue<PLL> q;
q.push({0,0});
while(q.size()){
auto [pos,con] = q.front(); q.pop();
for(auto [next,ncon] : G[pos][con]){
if(d[next][ncon]!=INF) continue;
d[next][ncon] = d[pos][con]+1;
q.push({next,ncon});
}
}
ll ans = INF;
cout << (d[N-1][0]==INF? -1:d[N-1][0]) << '\n';
}