結果
問題 | No.1299 Random Array Score |
ユーザー |
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提出日時 | 2020-11-28 19:26:39 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 640 ms / 2,000 ms |
コード長 | 2,981 bytes |
コンパイル時間 | 2,802 ms |
コンパイル使用メモリ | 79,056 KB |
実行使用メモリ | 63,736 KB |
最終ジャッジ日時 | 2024-09-12 23:27:38 |
合計ジャッジ時間 | 17,868 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 34 |
ソースコード
import java.util.*;import java.io.*;public class Main {public static void main(String[] args) throws Exception {FastScanner sc = new FastScanner(System.in);PrintWriter pw = new PrintWriter(System.out);int n = sc.nextInt();long mod = 998244353L;long k = sc.nextLong();long[] a = sc.nextLongArray(n);long total = 0;for(int i = 0; i < n; i++){total += a[i]*rep2(2, k, mod);total %= mod;}pw.println(total);pw.flush();}private static long rep2(long b, long n, long mod){if(n == 0) return 1;long bn = rep2(b,n/2,mod);if(n % 2 == 0){return (bn*bn)%mod;}else{return (bn*bn)%mod*b%mod;}}static class GeekInteger {public static void save_sort(int[] array) {shuffle(array);Arrays.sort(array);}public static int[] shuffle(int[] array) {int n = array.length;Random random = new Random();for (int i = 0, j; i < n; i++) {j = i + random.nextInt(n - i);int randomElement = array[j];array[j] = array[i];array[i] = randomElement;}return array;}}}class FastScanner {private BufferedReader reader = null;private StringTokenizer tokenizer = null;public FastScanner(InputStream in) {reader = new BufferedReader(new InputStreamReader(in));tokenizer = null;}public String next() {if (tokenizer == null || !tokenizer.hasMoreTokens()) {try {tokenizer = new StringTokenizer(reader.readLine());} catch (IOException e) {throw new RuntimeException(e);}}return tokenizer.nextToken();}public String nextLine() {if (tokenizer == null || !tokenizer.hasMoreTokens()) {try {return reader.readLine();} catch (IOException e) {throw new RuntimeException(e);}}return tokenizer.nextToken("\n");}public long nextLong() {return Long.parseLong(next());}public int nextInt() {return Integer.parseInt(next());}public double nextDouble() {return Double.parseDouble(next());}public String[] nextArray(int n) {String[] a = new String[n];for (int i = 0; i < n; i++)a[i] = next();return a;}public int[] nextIntArray(int n) {int[] a = new int[n];for (int i = 0; i < n; i++)a[i] = nextInt();return a;}public long[] nextLongArray(int n) {long[] a = new long[n];for (int i = 0; i < n; i++)a[i] = nextLong();return a;}}