結果
| 問題 | No.3391 Line up Dominoes |
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2025-12-02 18:28:03 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 787 ms / 3,000 ms |
| コード長 | 4,033 bytes |
| 記録 | |
| コンパイル時間 | 2,679 ms |
| コンパイル使用メモリ | 80,808 KB |
| 実行使用メモリ | 47,864 KB |
| 最終ジャッジ日時 | 2025-12-02 18:28:26 |
| 合計ジャッジ時間 | 21,601 ms |
|
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 23 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;
import java.math.*;
public class Main {
static final int MOD = 998244353;
public static void main(String[] args) throws Exception {
FastScanner sc = new FastScanner();
int n = sc.nextInt();
int m = sc.nextInt();
int k = sc.nextInt();
int[] values = new int[n + 1];
for (int i = 1; i <= n; i++) {
values[i] = sc.nextInt();
}
Arrays.sort(values);
int[] lefts = new int[n + 1];
int[] rights = new int[n + 1];
int low = 1;
int high = 1;
for (int i = 1; i <= n; i++) {
while (values[i] - values[low] > k) {
low++;
}
lefts[i] = low - 1;
while (high <= n && values[high] - values[i] <= k) {
high++;
}
rights[i] = high - 1;
}
int[] current = new int[n + 1];
for (int i = 1; i <= n; i++) {
current[i] = i;
}
int[] next = new int[n + 1];
while (m-- > 1) {
for (int i = 1; i <= n; i++) {
next[i] = next[i - 1];
next[i] += (current[rights[i]] - current[lefts[i]] + MOD) % MOD;
next[i] %= MOD;
}
int[] tmp = next;
next = current;
current = tmp;
}
System.out.println(current[n]);
}
}
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);
}
}
}
tenten