結果

問題 No.320 眠れない夜に
ユーザー Grenache
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
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 4
other AC * 31
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

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);
        }
    }
}
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