結果
| 問題 |
No.320 眠れない夜に
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2015-12-13 00:43:06 |
| 言語 | Java (openjdk 23) |
| 結果 |
AC
|
| 実行時間 | 55 ms / 2,000 ms |
| コード長 | 2,324 bytes |
| コンパイル時間 | 4,095 ms |
| コンパイル使用メモリ | 78,576 KB |
| 実行使用メモリ | 37,340 KB |
| 最終ジャッジ日時 | 2024-09-15 10:56:16 |
| 合計ジャッジ時間 | 6,751 ms |
|
ジャッジサーバーID (参考情報) |
judge5 / judge6 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 4 |
| other | AC * 31 |
ソースコード
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Iterator;
public class Main_yukicoder320 {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Printer pr = new Printer(System.out);
int n = sc.nextInt();
long m = sc.nextLong();
long[] a = new long[n + 1];
a[1] = 1;
a[2] = 1;
for (int i = 3; i <= n; i++) {
a[i] = a[i - 1] + a[i - 2];
}
long[] diff = new long[n + 1];
for (int j = 3; j <= n; j++) {
long[] b = new long[n + 1];
b[1] = 1;
b[2] = 1;
for (int i = 3; i <= n; i++) {
b[i] = b[i - 1] + b[i - 2];
if (i == j) {
b[i]--;
}
}
diff[j] = a[n] - b[n];
}
long d = a[n] - m;
int cnt = 0;
for (int i = 3; i <= n; i++) {
if (d - diff[i] >= 0) {
d -= diff[i];
cnt++;
}
}
if (d != 0) {
pr.println(-1);
} else {
pr.println(cnt);
}
pr.close();
sc.close();
}
@SuppressWarnings("unused")
private static class Scanner {
BufferedReader br;
Iterator<String> it;
Scanner (InputStream in) {
br = new BufferedReader(new InputStreamReader(in));
}
String next() throws RuntimeException {
try {
if (it == null || !it.hasNext()) {
it = Arrays.asList(br.readLine().split(" ")).iterator();
}
return it.next();
} catch (IOException e) {
throw new IllegalStateException();
}
}
int nextInt() throws RuntimeException {
return Integer.parseInt(next());
}
long nextLong() throws RuntimeException {
return Long.parseLong(next());
}
float nextFloat() throws RuntimeException {
return Float.parseFloat(next());
}
double nextDouble() throws RuntimeException {
return Double.parseDouble(next());
}
void close() {
try {
br.close();
} catch (IOException e) {
// throw new IllegalStateException();
}
}
}
private static class Printer extends PrintWriter {
Printer(PrintStream out) {
super(out);
}
}
}