結果
| 問題 |
No.614 壊れたキャンパス
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2019-05-29 06:02:14 |
| 言語 | D (dmd 2.109.1) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 3,435 bytes |
| コンパイル時間 | 1,159 ms |
| コンパイル使用メモリ | 145,884 KB |
| 実行使用メモリ | 101,864 KB |
| 最終ジャッジ日時 | 2024-06-22 01:29:09 |
| 合計ジャッジ時間 | 8,854 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 8 WA * 12 |
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.complex, std.container, std.math, 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)); }
int N, M;
long K, S, T;
int[] A;
long[] B, C;
void main() {
try {
for (; ; ) {
N = readInt();
M = readInt();
K = readLong();
S = readLong();
T = readLong();
A = new int[M];
B = new long[M];
C = new long[M];
foreach (i; 0 .. M) {
A[i] = readInt() - 1;
B[i] = readLong();
C[i] = readLong();
}
auto ys = new long[][N];
foreach (a; 0 .. N) {
ys[a] ~= 1;
ys[a] ~= K;
}
ys[0] ~= S;
ys[N - 1] ~= T;
foreach (i; 0 .. M) {
ys[A[i]] ~= B[i];
ys[A[i] + 1] ~= C[i];
}
auto len = new int[N];
int V;
auto ids = new int[][N];
foreach (a; 0 .. N) {
ys[a] = ys[a].sort.uniq.array;
len[a] = cast(int)(ys[a].length);
ids[a] = iota(V, V + len[a]).array;
V += len[a];
}
debug {
writeln("len = ", len);
writeln("ys = ", ys);
writeln("V = ", V);
writeln("ids = ", ids);
}
alias Edge = Tuple!(long, int);
auto graph = new Edge[][V];
foreach (a; 0 .. N) {
foreach (j; 0 .. len[a] - 1) {
const u = ids[a][j];
const v = ids[a][j + 1];
const c = ys[a][j + 1] - ys[a][j];
graph[u] ~= Edge(c, v);
}
}
int getId(int a, long y) {
return ids[a][ys[a].lowerBound(y)];
}
const src = getId(0, S);
const dst = getId(N - 1, T);
foreach (i; 0 .. M) {
const u = getId(A[i], B[i]);
const v = getId(A[i] + 1, C[i]);
graph[u] ~= Edge(0, v);
graph[v] ~= Edge(0, u);
}
BinaryHeap!(Array!Edge, "a > b") q;
auto dist = new long[V];
dist[] = -1;
dist[src] = 0;
q.insert(Edge(0, src));
long ans = -1;
for (; !q.empty; ) {
const c = q.front[0];
const u = q.front[1];
q.removeFront;
if (dist[u] == c) {
foreach (e; graph[u]) {
const cc = c + e[0];
const v = e[1];
if (dist[v] == -1 || dist[v] > cc) {
dist[v] = cc;
q.insert(Edge(cc, v));
}
}
}
}
writeln(dist[dst]);
}
} catch (EOFException e) {
}
}