結果
| 問題 |
No.788 トラックの移動
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2022-08-24 10:43:04 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 1,657 ms / 2,000 ms |
| コード長 | 3,802 bytes |
| コンパイル時間 | 2,488 ms |
| コンパイル使用メモリ | 78,928 KB |
| 実行使用メモリ | 78,912 KB |
| 最終ジャッジ日時 | 2024-12-15 07:14:55 |
| 合計ジャッジ時間 | 12,349 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 14 |
ソースコード
import java.io.*;
import java.util.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
int m = sc.nextInt();
int k = sc.nextInt() - 1;
long[] tracks = new long[n];
int zeros = 0;
ArrayList<ArrayList<Path>> graph = new ArrayList<>();
for (int i = 0; i < n; i++) {
tracks[i] = sc.nextInt();
graph.add(new ArrayList<>());
if (tracks[i] == 0) {
zeros++;
}
}
if (zeros >= n - 1) {
System.out.println(0);
return;
}
for (int i = 0; i < m; i++) {
int a = sc.nextInt() - 1;
int b = sc.nextInt() - 1;
int c = sc.nextInt();
graph.get(a).add(new Path(b, c));
graph.get(b).add(new Path(a, c));
}
PriorityQueue<Path> queue = new PriorityQueue<>();
int[][] costs = new int[n][n];
for (int i = 0; i < n; i++) {
Arrays.fill(costs[i], Integer.MAX_VALUE);
queue.add(new Path(i, 0));
while (queue.size() > 0) {
Path p = queue.poll();
if (costs[i][p.idx] <= p.value) {
continue;
}
costs[i][p.idx] = p.value;
for (Path x : graph.get(p.idx)) {
queue.add(new Path(x.idx, x.value + p.value));
}
}
}
long ans = Long.MAX_VALUE;
for (int i = 0; i < n; i++) {
long sum = 0;
long start = Long.MAX_VALUE;
for (int j = 0; j < n; j++) {
sum += costs[i][j] * tracks[j] * 2;
if (tracks[j] > 0) {
start = Math.min(start, costs[j][k] - costs[i][j]);
}
}
ans = Math.min(ans, start + sum);
}
System.out.println(ans);
}
static class Path implements Comparable<Path> {
int idx;
int value;
public Path(int idx, int value) {
this.idx = idx;
this.value = value;
}
public int compareTo(Path another) {
return value - another.value;
}
}
}
class BinaryIndexedTree {
int size;
int[] tree;
public BinaryIndexedTree(int size) {
this.size = size;
tree = new int[size];
}
public void add(int idx, int value) {
int mask = 1;
while (idx < size) {
if ((idx & mask) != 0) {
tree[idx] += value;
idx += mask;
}
mask <<= 1;
}
}
public int getSum(int from, int to) {
return getSum(to) - getSum(from - 1);
}
public int getSum(int x) {
int mask = 1;
int ans = 0;
while (x > 0) {
if ((x & mask) != 0) {
ans += tree[x];
x -= mask;
}
mask <<= 1;
}
return ans;
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
public Scanner() throws Exception {
}
public int nextInt() throws Exception {
return Integer.parseInt(next());
}
public long nextLong() throws Exception {
return Long.parseLong(next());
}
public double nextDouble() throws Exception {
return Double.parseDouble(next());
}
public String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
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