結果
| 問題 |
No.1308 ジャンプビーコン
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-12-05 01:18:53 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
TLE
|
| 実行時間 | - |
| コード長 | 3,274 bytes |
| コンパイル時間 | 1,020 ms |
| コンパイル使用メモリ | 142,012 KB |
| 実行使用メモリ | 253,608 KB |
| 最終ジャッジ日時 | 2024-06-22 10:16:00 |
| 合計ジャッジ時間 | 8,332 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 15 TLE * 1 -- * 21 |
ソースコード
import std.conv, std.functional, std.range, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.bitmanip, std.complex, std.container, std.math, std.mathspecial, std.numeric, std.regex, std.typecons;
import core.bitop;
class EOFException : Throwable { this() { super("EOF"); } }
string[] tokens;
string readToken() { for (; tokens.empty; ) { if (stdin.eof) { throw new EOFException; } tokens = readln.split; } auto token = tokens.front; tokens.popFront; return token; }
int readInt() { return readToken.to!int; }
long readLong() { return readToken.to!long; }
real readReal() { return readToken.to!real; }
bool chmin(T)(ref T t, in T f) { if (t > f) { t = f; return true; } else { return false; } }
bool chmax(T)(ref T t, in T f) { if (t < f) { t = f; return true; } else { return false; } }
int binarySearch(alias pred, T)(in T[] as) { int lo = -1, hi = cast(int)(as.length); for (; lo + 1 < hi; ) { const mid = (lo + hi) >> 1; (unaryFun!pred(as[mid]) ? hi : lo) = mid; } return hi; }
int lowerBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a >= val)); }
int upperBound(T)(in T[] as, T val) { return as.binarySearch!(a => (a > val)); }
enum E = 13;
enum INF = 10L^^18;
int N, Q;
long C;
int[] A, B;
long[] L;
int[] X;
int[][] G;
void dfs(long[] dist, int u, int p, long d) {
dist[u] = d;
foreach (i; G[u]) {
const v = A[i] ^ B[i] ^ u;
if (v != p) {
dfs(dist, v, u, d + L[i]);
}
}
}
long[] shortest(long[] ini) {
alias Node = Tuple!(long, "c", int, "u");
BinaryHeap!(Array!Node, "a > b") que;
auto ds = ini.dup;
foreach (u; 0 .. N) {
que.insert(Node(ds[u], u));
}
for (; !que.empty; ) {
const c = que.front.c;
const u = que.front.u;
que.removeFront;
if (ds[u] == c) {
foreach (i; G[u]) {
const v = A[i] ^ B[i] ^ u;
const cc = c + L[i];
if (chmin(ds[v], cc)) {
que.insert(Node(cc, v));
}
}
}
}
return ds;
}
void main() {
try {
for (; ; ) {
N = readInt();
Q = readInt();
C = readLong();
A = new int[N - 1];
B = new int[N - 1];
L = new long[N - 1];
foreach (i; 0 .. N - 1) {
A[i] = readInt() - 1;
B[i] = readInt() - 1;
L[i] = readLong();
}
X = new int[Q];
foreach (q; 0 .. Q) {
X[q] = readInt() - 1;
}
G = new int[][N];
foreach (i; 0 .. N - 1) {
G[A[i]] ~= i;
G[B[i]] ~= i;
}
auto dist = new long[][](N, N);
foreach (u; 0 .. N) {
dfs(dist[u], u, -1, 0);
}
auto dp = new long[][](Q, N);
foreach (q; 0 .. Q) {
dp[q][] = INF;
}
dp[0][X[0]] = 0;
foreach (q; 0 .. Q - 1) {
foreach (u; 0 .. N) {
chmin(dp[q + 1][u], dp[q][u] + dist[X[q]][X[q + 1]]);
}
auto ini = dp[q].dup;
ini[] += C;
chmin(ini[X[q]], dp[q].minElement);
const res = shortest(ini);
foreach (u; 0 .. N) {
chmin(dp[q + 1][u], res[u] + dist[u][X[q + 1]]);
}
}
debug {
foreach (q; 0 .. Q) {
writeln(dp[q]);
}
}
const ans = dp[Q - 1].minElement;
writeln(ans);
}
} catch (EOFException e) {
}
}