結果
| 問題 |
No.1545 [Cherry 2nd Tune N] Anthem
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2021-06-11 21:49:57 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 415 ms / 3,000 ms |
| コード長 | 3,109 bytes |
| コンパイル時間 | 2,490 ms |
| コンパイル使用メモリ | 209,244 KB |
| 最終ジャッジ日時 | 2025-01-22 05:42:40 |
|
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 67 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < n; i++)
#define rep2(i, x, n) for(int i = x; i <= n; i++)
#define rep3(i, x, n) for(int i = x; i >= n; i--)
#define each(e, v) for(auto &e: v)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)x.size()
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
const int MOD = 1000000007;
//const int MOD = 998244353;
const int inf = (1<<30)-1;
const ll INF = (1LL<<60)-1;
template<typename T> bool chmax(T &x, const T &y) {return (x < y)? (x = y, true) : false;};
template<typename T> bool chmin(T &x, const T &y) {return (x > y)? (x = y, true) : false;};
struct io_setup{
io_setup(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout << fixed << setprecision(15);
}
} io_setup;
vector<ll> a;
int N, K;
template<typename T, bool directed = false>
struct Weighted_Graph{
struct edge{
int to; T cost; int id;
edge(int to, T cost, int id) : to(to), cost(cost), id(id) {}
};
vector<vector<edge>> es;
const T INF_T;
const int n;
int m;
vector<T> d;
vector<int> pre_v;
Weighted_Graph(int n) : es(n), INF_T(numeric_limits<T>::max()/2), n(n), m(0), d(n), pre_v(n) {}
void add_edge(int from, int to, T cost){
es[from].emplace_back(to, cost, m);
if(!directed) es[to].emplace_back(from, cost, m);
m++;
}
T dijkstra(int s, int t = 0){
fill(begin(d), end(d), INF_T);
using P = pair<T, int>;
priority_queue<P, vector<P>, greater<P> > que;
que.emplace(d[s] = 0, s);
while(!que.empty()){
auto [p, i] = que.top(); que.pop();
if(p > d[i]) continue;
for(auto &e: es[i]){
if(d[i]+e.cost < d[e.to]){
pre_v[e.to] = i, que.emplace(d[e.to] = d[i]+e.cost, e.to);
}
}
}
return d[t];
}
vector<int> shortest_path(int s, int t){
//if(dijkstra(s, t) == INF_T) return {};
vector<int> ret;
for(int now = t; now != s; now = pre_v[now]) ret.push_back(now);
ret.push_back(s), reverse(begin(ret), end(ret));
return ret;
}
};
int main(){
int S, T; cin >> N >> S >> T >> K; S--, T--;
Weighted_Graph<ll, true> G(N*K);
a.resize(N);
rep(i, N) cin >> a[i];
int M; cin >> M;
rep(i, M){
int u, v; ll c; cin >> u >> v >> c; u--, v--;
c += a[v];
rep(j, K-1){
G.add_edge(u*K+j, v*K+j+1, c);
}
G.add_edge(u*K+K-1, v*K+K-1, c);
}
ll ans = G.dijkstra(S*K, T*K+K-1);
if(ans >= INF) {cout << "Impossible\n"; return 0;}
//rep(i, N*K) cout << G.d[i] << ' '; cout << '\n';
cout << "Possible\n" << ans+a[S] << '\n';
vector<int> path = G.shortest_path(S*K, T*K+K-1);
int n = sz(path);
cout << n << '\n';
rep(i, n) cout << (path[i]/K)+1 << (i == n-1? '\n' : ' ');
}