結果
| 問題 | No.3 ビットすごろく |
| コンテスト | |
| ユーザー |
fujisu
|
| 提出日時 | 2015-02-02 20:57:26 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 69 ms / 5,000 ms |
| コード長 | 3,025 bytes |
| コンパイル時間 | 2,286 ms |
| コンパイル使用メモリ | 78,216 KB |
| 実行使用メモリ | 50,512 KB |
| 最終ジャッジ日時 | 2024-07-01 07:12:44 |
| 合計ジャッジ時間 | 5,269 ms |
|
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| other | AC * 33 |
ソースコード
import java.io.IOException;
import java.util.InputMismatchException;
import java.util.LinkedList;
import java.util.Queue;
public class Main {
int n;
int[] step, memo;
int bfs() {
class Q implements Comparable<Q> {
int pos, dep;
Q(int pos, int dep) {
this.pos = pos;
this.dep = dep;
}
public int compareTo(Q o) {
return this.pos != o.pos ? this.pos - o.pos : this.dep - o.dep;
}
}
Queue<Q> queue = new LinkedList<Q>();
queue.add(new Q(1, 0));
boolean[] visit = new boolean[n];
while (!queue.isEmpty()) {
Q q = queue.poll();
int pos = q.pos;
int dep = q.dep;
if (pos == n) {
return dep + 1;
}
if (visit[pos])
continue;
visit[pos] = true;
int s = step[pos];
if (0 <= pos - s)
queue.add(new Q(pos - s, dep + 1));
if (pos + s <= n)
queue.add(new Q(pos + s, dep + 1));
}
return -1;
}
void run() {
MyScanner sc = new MyScanner();
n = sc.nextInt();
step = new int[n];
for (int i = 0; i < n; i++) {
step[i] = Integer.bitCount(i);
}
System.out.println(bfs());
}
public static void main(String[] args) {
new Main().run();
}
public void mapDebug(int[][] a) {
System.out.println("--------map display---------");
for (int i = 0; i < a.length; i++) {
for (int j = 0; j < a[i].length; j++) {
System.out.printf("%3d ", a[i][j]);
}
System.out.println();
}
System.out.println("----------------------------" + '\n');
}
class MyScanner {
int read() {
try {
return System.in.read();
} catch (IOException e) {
throw new InputMismatchException();
}
}
boolean isSpaceChar(int c) {
return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
}
boolean isEndline(int c) {
return c == '\n' || c == '\r' || c == -1;
}
int nextInt() {
return Integer.parseInt(next());
}
int[] nextIntArray(int n) {
int[] array = new int[n];
for (int i = 0; i < n; i++)
array[i] = nextInt();
return array;
}
long nextLong() {
return Long.parseLong(next());
}
long[] nextLongArray(int n) {
long[] array = new long[n];
for (int i = 0; i < n; i++)
array[i] = nextLong();
return array;
}
double nextDouble() {
return Double.parseDouble(next());
}
double[] nextDoubleArray(int n) {
double[] array = new double[n];
for (int i = 0; i < n; i++)
array[i] = nextDouble();
return array;
}
String next() {
int c = read();
while (isSpaceChar(c))
c = read();
StringBuilder res = new StringBuilder();
do {
res.appendCodePoint(c);
c = read();
} while (!isSpaceChar(c));
return res.toString();
}
String[] nextStringArray(int n) {
String[] array = new String[n];
for (int i = 0; i < n; i++)
array[i] = next();
return array;
}
String nextLine() {
int c = read();
while (isEndline(c))
c = read();
StringBuilder res = new StringBuilder();
do {
res.appendCodePoint(c);
c = read();
} while (!isEndline(c));
return res.toString();
}
}
}
fujisu