結果
| 問題 |
No.1512 作文
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2022-08-05 12:48:06 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 901 ms / 2,000 ms |
| コード長 | 2,702 bytes |
| コンパイル時間 | 2,211 ms |
| コンパイル使用メモリ | 79,092 KB |
| 実行使用メモリ | 136,220 KB |
| 最終ジャッジ日時 | 2024-09-15 08:32:26 |
| 合計ジャッジ時間 | 11,936 ms |
|
ジャッジサーバーID (参考情報) |
judge1 / judge6 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 38 |
ソースコード
import java.io.*;
import java.util.*;
public class Main {
static ArrayList<Word> words = new ArrayList<>();
static int[][] dp;
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
while (n-- > 0) {
Word tmp = new Word(sc.next());
if (tmp.isGood()) {
words.add(tmp);
}
}
Collections.sort(words);
dp = new int[words.size()][26];
for (int[] arr : dp) {
Arrays.fill(arr, -1);
}
System.out.println(dfw(words.size() - 1, 25));
}
static int dfw(int idx, int c) {
if (idx < 0) {
return 0;
}
if (dp[idx][c] < 0) {
Word current = words.get(idx);
if (current.right <= c) {
dp[idx][c] = Math.max(dfw(idx - 1, c), dfw(idx - 1, current.left) + current.length());
} else {
dp[idx][c] = dfw(idx - 1, c);
}
}
return dp[idx][c];
}
static class Word implements Comparable<Word> {
String name;
int left;
int right;
boolean good;
public Word(String name) {
this.name = name;
char prev = 'a';
good = true;
for (char c : name.toCharArray()) {
if (prev > c) {
good = false;
break;
}
prev = c;
}
left = name.charAt(0) - 'a';
right = prev - 'a';
}
public int compareTo(Word another) {
if (right == another.right) {
return left - another.left;
} else {
return right - another.right;
}
}
public int length() {
return name.length();
}
public boolean isGood() {
return good;
}
}
}
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();
}
}
tenten