結果
問題 | No.1800 Random XOR |
ユーザー | shojin_pro |
提出日時 | 2022-01-07 22:17:09 |
言語 | Java21 (openjdk 21) |
結果 |
AC
|
実行時間 | 53 ms / 2,000 ms |
コード長 | 3,953 bytes |
コンパイル時間 | 2,163 ms |
コンパイル使用メモリ | 78,644 KB |
実行使用メモリ | 37,392 KB |
最終ジャッジ日時 | 2024-04-26 18:44:27 |
合計ジャッジ時間 | 3,567 ms |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 53 ms
37,212 KB |
testcase_01 | AC | 49 ms
37,132 KB |
testcase_02 | AC | 48 ms
37,244 KB |
testcase_03 | AC | 46 ms
37,072 KB |
testcase_04 | AC | 44 ms
37,392 KB |
testcase_05 | AC | 47 ms
37,148 KB |
testcase_06 | AC | 47 ms
37,112 KB |
testcase_07 | AC | 47 ms
36,944 KB |
testcase_08 | AC | 45 ms
36,892 KB |
testcase_09 | AC | 45 ms
37,148 KB |
testcase_10 | AC | 46 ms
36,836 KB |
testcase_11 | AC | 50 ms
36,800 KB |
testcase_12 | AC | 48 ms
37,220 KB |
testcase_13 | AC | 47 ms
37,148 KB |
testcase_14 | AC | 46 ms
37,212 KB |
testcase_15 | AC | 47 ms
36,972 KB |
ソースコード
import java.util.*; import java.io.*; public class Main { static FastScanner sc = new FastScanner(System.in); static PrintWriter pw = new PrintWriter(System.out); static StringBuilder sb = new StringBuilder(); static long mod = (long) 1e9 + 7; public static void main(String[] args) throws Exception { solve(); pw.flush(); } public static void solve() { long n = sc.nextLong(); long m = sc.nextLong(); long ans = rep2(2,m,mod); ans = (ans + mod -1) % mod; ans *= modinv(2,mod); pw.println(ans % mod); } 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 long modinv(long a, long m) { long b = m; long u = 1; long v = 0; long tmp = 0; while (b > 0) { long t = a / b; a -= t * b; tmp = a; a = b; b = tmp; u -= t * v; tmp = u; u = v; v = tmp; } u %= m; if (u < 0) u += m; return u; } 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; } public static void save_sort(long[] array) { shuffle(array); Arrays.sort(array); } public static long[] shuffle(long[] array) { int n = array.length; Random random = new Random(); for (int i = 0, j; i < n; i++) { j = i + random.nextInt(n - i); long 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 FastScanner(FileReader in) { reader = new BufferedReader(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; } }