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  1. import java.io.BufferedReader;
  2. import java.io.InputStreamReader;
  3. import java.util.Map;
  4. import java.util.HashMap;
  5. import java.lang.Math;
  6.  
  7. class Main
  8. {
  9.  
  10.     private static long mod = 1L << 32;
  11.     public static Map<Long, Long> mp = new HashMap<Long, Long>();
  12.  
  13.     public static long f(long n) {
  14.         if (n <= 2) {
  15.             return 1;
  16.         }
  17.         if (mp.containsKey(n)) {
  18.             return mp.get(n);
  19.         }
  20.         if (n % 2 == 1) {
  21.             long d = (f(6 * n / 7) % mod + f(2 * n / 3) % mod) % mod;
  22.             mp.put(n, d);
  23.             return mp.get(n);
  24.         }
  25.         long o = (f(n - 1) % mod + f(n - 3) % mod) % mod;
  26.         mp.put(n, o);
  27.         return mp.get(n);
  28.     }
  29.  
  30.  
  31.     public static void main (String[] args) throws java.lang.Exception
  32.     {
  33.         BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));
  34.         String[] params1 = bufferedReader.readLine().split(" ");
  35.         long n;
  36.         n = Long.parseLong(params1[0]);
  37.         System.out.print(f(n));
  38.     }
  39. }
Success #stdin #stdout 0.04s 2184192KB
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https://ideone.com/g7Fa75
language:
Java (HotSpot 12)
created:
5 years ago
visibility:
public

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