#350467 (Java) No.2 素因数ゲーム

• 問題: No.2 素因数ゲーム
• ユーザー: Oland
• 提出日時: 2019-06-07 10:40:55
• 言語: Java (openjdk 23)
• 結果: AC
• 実行時間: 58 ms / 5,000 ms
• コード長: 4,215 bytes
• コンパイル時間: 2,645 ms
• コンパイル使用メモリ: 81,712 KB
• 実行使用メモリ: 37,260 KB
• 最終ジャッジ日時: 2024-12-26 13:55:53
• 合計ジャッジ時間: 5,437 ms
• ジャッジサーバーID （参考情報）: judge3 / judge5

ファイルパターン	結果
other	AC * 31

ソースコード

import java.io.*;
import java.util.*;
import java.util.Map.Entry;
import java.util.stream.Collectors;

@SuppressWarnings("unused")
public class Main {
	String fileName = "input.txt";
	final boolean isDebug = false;
	//final boolean isDebug = true;
	FastScanner in = new FastScanner(System.in);
	PrintWriter out = new PrintWriter(System.out);
	final int MOD = (int)1e9+7;
	final long INF = Long.MAX_VALUE / 2;
	//final int INF = Integer.MAX_VALUE / 2;
	
	void solve() throws Exception{
		long N = in.nextLong();
		ArrayList<long[]> list = primeFactor(N);
		long xor = 0;
		for(long[] e : list){
			xor ^= e[1];
		}
		System.out.println(xor != 0 ? "Alice" : "Bob");
	}
	
	ArrayList<long[]> primeFactor(long n){
		ArrayList<long[]> list = new ArrayList<>();
		for(long i = 2; i * i <= n; i++){
			if(n % i == 0){
				int cnt = 0;
				while (n % i == 0) {
					n /= i;
					cnt++;
				}
				list.add(new long[]{i, cnt});
			}
		}
		if(n > 1) list.add(new long[]{n, 1});
		return list;
	}
	
	/* end solve */
	
	/* main */
	public static void main(String[] args) throws Exception {
		new Main().m();
	}
	
	void m() throws Exception {
		if(isDebug) in = new FastScanner(new FileInputStream(fileName));
		solve();
		out.flush();
	}
	/* end main */
}
/* end Main */

class UnionFind{
	int[] par;
	int[] rank;
	int[] size;
	int group;
	
	UnionFind(int n){
		par = new int[n];
		rank = new int[n];
		size = new int[n];
		group = n;
		for(int i = 0; i < n; i++){
			par[i] = i;
			rank[i] = 0;
			size[i] = 1;
		}
	}
	
	//経路圧縮しながらrootを求める
	int find(int x){
		if(par[x] == x){
			return x;
		}else{
			int f = find(par[x]);
			return par[x] = f;
		}
	}
	
	//ランクの小さいほうにつなげる
	boolean union(int x, int y, int w){
		x = find(x);
		y = find(y);
		if(x == y) return false;
		
		if(rank[x] < rank[y]){
			int tmp = x; x = y; y = tmp;
			w = -w;
		}
		
		//y(のroot)をx(のroot)の下にくっつける
		//yのほうが重くなる(ポテンシャルが高くなる)
		if(rank[x] == rank[y]) rank[x]++;
		group--;
		par[y] = x;
		size[x] += size[y];
		
		return true;
	}
	
	boolean union(int x, int y){
		return union(x, y, 0);
	}
	
	boolean isSame(int x, int y){
		return find(x) == find(y);
	}
}

class FastScanner {
	Reader input;

	FastScanner() {this(System.in);}
	FastScanner(InputStream stream) {this.input = new BufferedReader(new InputStreamReader(stream));}

	int nextInt() {return (int) nextLong();}

	long nextLong() {
		try {
			int sign = 1;
			int b = input.read();
			while ((b < '0' || '9' < b) && b != '-' && b != '+') {
				b = input.read();
			}
			if (b == '-') {
				sign = -1;
				b = input.read();
			} else if (b == '+') {
				b = input.read();
			}
			long ret = b - '0';
			while (true) {
				b = input.read();
				if (b < '0' || '9' < b) return ret * sign;
				ret *= 10;
				ret += b - '0';
			}
		} catch (IOException e) {
			e.printStackTrace();
			return -1;
		}
	}

	double nextDouble() {
		try {
			double sign = 1;
			int b = input.read();
			while ((b < '0' || '9' < b) && b != '-' && b != '+') {
				b = input.read();
			}
			if (b == '-') {
				sign = -1;
				b = input.read();
			} else if (b == '+') {
				b = input.read();
			}
			double ret = b - '0';
			while (true) {
				b = input.read();
				if (b < '0' || '9' < b) break;
				ret *= 10;
				ret += b - '0';
			}
			if (b != '.') return sign * ret;
			double div = 1;
			b = input.read();
			while ('0' <= b && b <= '9') {
				ret *= 10;
				ret += b - '0';
				div *= 10;
				b = input.read();
			}
			return sign * ret / div;
		} catch (IOException e) {
			e.printStackTrace();
			return Double.NaN;
		}
	}

	char nextChar() {
		try {
			int b = input.read();
			while (Character.isWhitespace(b)) {
				b = input.read();
			}
			return (char) b;
		} catch (IOException e) {
			e.printStackTrace();
			return 0;
		}
	}

	String nextStr() {
		try {
			StringBuilder sb = new StringBuilder();
			int b = input.read();
			while (Character.isWhitespace(b)) {
				b = input.read();
			}
			while (b != -1 && !Character.isWhitespace(b)) {
				sb.append((char) b);
				b = input.read();
			}
			return sb.toString();
		} catch (IOException e) {
			e.printStackTrace();
			return "";
		}
	}
}