結果
| 問題 |
No.788 トラックの移動
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-02-23 10:19:52 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 2,760 bytes |
| コンパイル時間 | 924 ms |
| コンパイル使用メモリ | 136,260 KB |
| 実行使用メモリ | 7,036 KB |
| 最終ジャッジ日時 | 2024-06-13 04:13:11 |
| 合計ジャッジ時間 | 7,530 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 12 WA * 2 |
ソースコード
import std.conv, std.functional, std.stdio, std.string;
import std.algorithm, std.array, std.bigint, std.container, std.math, std.numeric, std.range, 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 INF = 10L^^18;
int N, M, L;
long[] T;
int[] A, B;
long[] C;
int[][] G;
long[] distFrom(int src) {
alias Node = Tuple!(long, int);
auto q = BinaryHeap!(Array!Node)();
auto d = new long[N];
d[] = INF;
d[src] = 0;
q.insert(Node(0, src));
for (; !q.empty; ) {
const c = q.front[0];
const u = q.front[1];
q.removeFront;
if (d[u] == c) {
foreach (i; G[u]) {
const v = A[i] ^ B[i] ^ u;
const cc = c + C[i];
if (d[v] > cc) {
d[v] = cc;
q.insert(Node(cc, v));
}
}
}
}
return d;
}
void main() {
try {
for (; ; ) {
N = readInt();
M = readInt();
L = readInt() - 1;
T = new long[N];
foreach (u; 0 .. N) {
T[u] = readLong();
}
A = new int[M];
B = new int[M];
C = new long[M];
foreach (i; 0 .. M) {
A[i] = readInt() - 1;
B[i] = readInt() - 1;
C[i] = readLong();
}
G = new int[][N];
foreach (i; 0 .. M) {
G[A[i]] ~= i;
G[B[i]] ~= i;
}
const d0 = distFrom(L);
long ans = INF;
foreach (s; 0 .. N) {
const d1 = distFrom(s);
long cost;
foreach (u; 0 .. N) {
cost += 2 * d1[u] * T[u];
}
long lost = INF;
foreach (u; 0 .. N) {
if (T[u] > 0) {
chmin(lost, d0[u] - d1[u]);
}
}
cost += lost;
debug {
writefln("s = %s: cost = %s", s, cost);
}
chmin(ans, cost);
}
writeln(ans);
}
} catch (EOFException e) {
}
}