結果
| 問題 | No.3111 Toll Optimization |
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2025-04-21 17:36:40 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 1,559 ms / 5,000 ms |
| コード長 | 4,612 bytes |
| 記録 | |
| コンパイル時間 | 3,090 ms |
| コンパイル使用メモリ | 83,028 KB |
| 実行使用メモリ | 118,068 KB |
| 最終ジャッジ日時 | 2025-04-21 17:37:39 |
| 合計ジャッジ時間 | 56,638 ms |
|
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 70 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
FastScanner sc = new FastScanner();
int n = sc.nextInt();
int m = sc.nextInt();
int k = sc.nextInt();
List<Map<Integer, Integer>> graph = new ArrayList<>();
for (int i = 0; i < n; i++) {
graph.add(new HashMap<>());
}
int[] tmp = new int[m];
for (int i = 0; i < m; i++) {
tmp[i] = sc.nextInt();
}
for (int i = 0; i < m; i++) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
graph.get(a).put(b, tmp[i]);
graph.get(b).put(a, tmp[i]);
}
long[][] costs = new long[k + 1][n];
for (long[] arr : costs) {
Arrays.fill(arr, Long.MAX_VALUE);
}
PriorityQueue<Path> queue = new PriorityQueue<>();
queue.add(new Path(0, 0, 0));
while (queue.size() > 0) {
Path p = queue.poll();
if (p.base > k || costs[p.base][p.idx] <= p.value) {
continue;
}
costs[p.base][p.idx] = p.value;
for (int x : graph.get(p.idx).keySet()) {
queue.add(new Path(x, p.base, p.value + graph.get(p.idx).get(x)));
queue.add(new Path(x, p.base + 1, p.value));
}
}
long ans = Long.MAX_VALUE;
for (int i = 0; i <= k; i++) {
ans = Math.min(ans, costs[i][n - 1]);
}
System.out.println(ans == Long.MAX_VALUE ? -1 : ans);
}
static class Path implements Comparable<Path> {
int idx;
int base;
long value;
public Path(int idx, int base, long value) {
this.idx = idx;
this.value = value;
this.base = base;
}
public int compareTo(Path another) {
return Long.compare(value, another.value);
}
}
}
class FastScanner {
private DataInputStream din;
private byte[] buffer;
private int bufferPointer, bytesRead;
private static final int BUFFER_SIZE = 1 << 16; // 65,536 バイト
public FastScanner() {
din = new DataInputStream(System.in);
buffer = new byte[BUFFER_SIZE];
bufferPointer = bytesRead = 0;
}
private byte read() {
try {
if (bufferPointer == bytesRead) {
bytesRead = din.read(buffer, 0, BUFFER_SIZE);
if (bytesRead == -1) return -1;
bufferPointer = 0;
}
return buffer[bufferPointer++];
} catch (IOException e) {
throw new RuntimeException(e);
}
}
public String next() {
byte b = read();
// 空白文字を読み飛ばす
while (isSpaceChar(b)) {
b = read();
}
StringBuilder sb = new StringBuilder();
while (!isSpaceChar(b)) {
sb.append((char) b);
b = read();
}
return sb.toString();
}
public int nextInt() {
int ret = 0;
byte c = read();
while (isSpaceChar(c)) c = read();
boolean neg = (c == '-');
if (neg) c = read();
do {
ret = ret * 10 + c - '0';
c = read();
} while (!isSpaceChar(c));
return neg ? -ret : ret;
}
public long nextLong() {
long ret = 0;
byte c = read();
while (isSpaceChar(c)) c = read();
boolean neg = (c == '-');
if (neg) c = read();
do {
ret = ret * 10L + c - '0';
c = read();
} while (!isSpaceChar(c));
return neg ? -ret : ret;
}
public double nextDouble() {
double ret = 0, div = 1;
byte c = read();
while (isSpaceChar(c)) c = read();
boolean neg = (c == '-');
if (neg) c = read();
do {
ret = ret * 10 + c - '0';
c = read();
} while (!isSpaceChar(c) && c != '.');
if (c == '.') {
while (!isSpaceChar(c = read())) {
ret += (c - '0') / (div *= 10);
}
}
return neg ? -ret : ret;
}
private boolean isSpaceChar(byte c) {
return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
}
public void close() {
try {
if (din != null) din.close();
} catch (IOException e) {
throw new RuntimeException(e);
}
}
}
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