結果
| 問題 |
No.2328 Build Walls
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-07-27 09:30:16 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 914 ms / 3,000 ms |
| コード長 | 3,187 bytes |
| コンパイル時間 | 4,069 ms |
| コンパイル使用メモリ | 85,040 KB |
| 実行使用メモリ | 62,860 KB |
| 最終ジャッジ日時 | 2024-10-04 02:03:25 |
| 合計ジャッジ時間 | 18,213 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge3 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 34 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int h = sc.nextInt() - 2;
int w = sc.nextInt();
int[][] fields = new int[h][w];
for (int i = 0; i < h; i++) {
for (int j = 0; j < w; j++) {
fields[i][j] = sc.nextInt();
}
}
PriorityQueue<Path> queue = new PriorityQueue<>();
for (int i = 0; i < h; i++) {
queue.add(new Path(i, 0, 0));
}
int[][] costs = new int[h][w];
for (int[] arr : costs) {
Arrays.fill(arr, Integer.MAX_VALUE);
}
while (queue.size() > 0) {
Path p = queue.poll();
p.value += fields[p.r][p.c];
if (costs[p.r][p.c] <= p.value || fields[p.r][p.c] == -1) {
continue;
}
costs[p.r][p.c] = p.value;
for (int i = Math.max(0, p.r - 1); i <= p.r + 1 && i < h; i++) {
for (int j = Math.max(0, p.c - 1); j <= p.c + 1 && j < w; j++) {
if (costs[i][j] == Integer.MAX_VALUE) {
queue.add(new Path(i, j, p.value));
}
}
}
}
int ans = Integer.MAX_VALUE;
for (int[] arr : costs) {
ans = Math.min(ans, arr[w - 1]);
}
if (ans == Integer.MAX_VALUE) {
System.out.println(-1);
} else {
System.out.println(ans);
}
}
static class Path implements Comparable<Path> {
int r;
int c;
int value;
public Path(int r, int c, int value) {
this.r = r;
this.c = c;
this.value = value;
}
public int compareTo(Path another) {
return value - another.value;
}
}
}
class Utilities {
static String arrayToLineString(Object[] arr) {
return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
}
static String arrayToLineString(int[] arr) {
return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
}
}
class Scanner {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer("");
StringBuilder sb = new StringBuilder();
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 int[] nextIntArray() throws Exception {
return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
}
public String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
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