結果
| 問題 |
No.801 エレベーター
|
| コンテスト | |
| ユーザー |
tenten
|
| 提出日時 | 2023-01-31 16:17:04 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 353 ms / 2,000 ms |
| コード長 | 2,600 bytes |
| コンパイル時間 | 2,721 ms |
| コンパイル使用メモリ | 92,412 KB |
| 実行使用メモリ | 56,340 KB |
| 最終ジャッジ日時 | 2024-06-30 18:46:54 |
| 合計ジャッジ時間 | 10,489 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge2 |
(要ログイン)
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 26 |
ソースコード
import java.io.*;
import java.util.*;
import java.util.stream.*;
public class Main {
static final int MOD = 1000000007;
public static void main(String[] args) throws Exception {
Scanner sc = new Scanner();
int n = sc.nextInt();
int m = sc.nextInt();
int k = sc.nextInt();
int[] lefts = new int[m];
int[] rights = new int[m];
for (int i = 0; i < m; i++) {
lefts[i] = sc.nextInt();
rights[i] = sc.nextInt();
}
int[] current = new int[n + 2];
Arrays.fill(current, 1);
current[0] = 0;
while (k-- > 0) {
int[] next = new int[n + 2];
for (int i = 0; i < m; i++) {
int size = (current[rights[i]] - current[lefts[i] - 1] + MOD) % MOD;
next[lefts[i]] += size;
next[lefts[i]] %= MOD;
next[rights[i] + 1] += MOD - size;
next[rights[i] + 1] %= MOD;
}
for (int i = 1; i < next.length; i++) {
next[i] += next[i - 1];
next[i] %= MOD;
}
for (int i = 1; i < next.length; i++) {
next[i] += next[i - 1];
next[i] %= MOD;
}
current = next;
}
System.out.println((current[n] - current[n - 1] + MOD) % MOD);
}
}
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();
}
}
tenten