[Link] https://AtCoder.jp/contests/arc135/tasks/arc135_a
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
import java.util.*;
import java.io.*;
public class Main {
static BufferedReader br;
static StringBuilder sb = new StringBuilder();
static HashMap<Long, Long> hm = new HashMap<>();
static long mod = 998244353l;
public static void main(String[] args) throws IOException {
br = new BufferedReader(new InputStreamReader(System.in));
long x = tol(br.readLine());
println(getMax(x));
}
static long getMax(long x) {
if(hm.containsKey(x)) return hm.get(x);
long lower = x / 2, upper = (x + 1) / 2;
if((x & 1) == 1) {
if(x >= 5) {
long val = (getMax(lower) * getMax(upper)) % mod;
hm.put(x, val);
return val % mod;
}
else return x;
} else {
if(x >= 6) {
long val = getMax(lower);
val = (val * val) % mod;
hm.put(x, val);
return (val) % mod;
}
else return x;
}
}
static int toi(String s) { return Integer.parseInt(s); }
static long tol(String s) { return Long.parseLong(s); }
static String[] getLine() throws IOException { return br.readLine().split(" "); }
static int[] getArr() throws IOException { return Arrays.stream(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray(); }
static <T> void print(T s) { System.out.print(s); }
static <T> void println(T s) { System.out.println(s); }
}