結果

問題 No.2064 Smallest Sequence on Grid
ユーザー tenten
提出日時 2022-09-05 15:05:12
言語 Java
(openjdk 23)
結果
AC  
実行時間 1,546 ms / 3,000 ms
コード長 2,467 bytes
コンパイル時間 3,077 ms
コンパイル使用メモリ 78,596 KB
実行使用メモリ 92,372 KB
最終ジャッジ日時 2024-11-20 15:49:35
合計ジャッジ時間 20,279 ms
ジャッジサーバーID
(参考情報)
judge1 / judge4
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 2
other AC * 29
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

import java.io.*;
import java.util.*;
public class Main {
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int h = sc.nextInt();
int w = sc.nextInt();
char[][] field = new char[h][];
for (int i = 0; i < h; i++) {
field[i] = sc.next().toCharArray();
}
StringBuilder ans = new StringBuilder();
HashSet<Integer> current = new HashSet<>();
HashSet<Integer> next = new HashSet<>();
current.add(0);
for (int i = 0; i < h + w - 1; i++) {
char min = (char)('z' + 1);
for (int x : current) {
int r = x / w;
int c = x % w;
if (ans.length() == i) {
ans.append(field[r][c]);
}
if (r < h - 1) {
if (field[r + 1][c] < min) {
min = field[r + 1][c];
next.clear();
next.add((r + 1) * w + c);
} else if (field[r + 1][c] == min) {
next.add((r + 1) * w + c);
}
}
if (c < w - 1) {
if (field[r][c + 1] < min) {
min = field[r][c + 1];
next.clear();
next.add(r * w + c + 1);
} else if (field[r][c + 1] == min) {
next.add(r * w + c + 1);
}
}
}
HashSet<Integer> tmp = next;
next = current;
current = tmp;
next.clear();
}
System.out.println(ans);
}
}
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 String next() throws Exception {
while (!st.hasMoreTokens()) {
st = new StringTokenizer(br.readLine());
}
return st.nextToken();
}
}
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