結果

問題 No.314 ケンケンパ
ユーザー Tsukasa_Type
提出日時 2018-03-10 20:34:34
言語 Java
(openjdk 23)
結果
RE  
実行時間 -
コード長 2,133 bytes
コンパイル時間 2,329 ms
コンパイル使用メモリ 77,592 KB
実行使用メモリ 52,660 KB
最終ジャッジ日時 2024-10-14 17:54:59
合計ジャッジ時間 4,235 ms
ジャッジサーバーID
（参考情報） 		judge2 / judge5
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 * 3
other AC * 15 RE * 2
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.*;
import java.util.*;
import static java.lang.System.*;
public class Main {
    static FastScanner sc = new FastScanner(System.in);
    public static void main(String[] args) {
        int n = sc.nextInt();
        long[] dp = new long[n+1];
        dp[1] = 1;
        dp[2] = 2;
        dp[3] = 2;
        for (int i=4; i<=n; i++) {
            dp[i] = (dp[i-2]+dp[i-3]) % 1000000007;
        }
        out.println(dp[n]);
    }
}
class FastScanner implements Closeable {
    private final InputStream in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    public FastScanner(InputStream in) {this.in = in;}
    private boolean hasNextByte() {
        if (ptr < buflen) {return true;}
        else{
            ptr = 0;
            try {buflen = in.read(buffer);}
            catch (IOException e) {e.printStackTrace();}
            if (buflen <= 0) {return false;}
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {throw new NumberFormatException();}
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){return minus ? -n : n;}
            else{throw new NumberFormatException();}
            b = readByte();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() { return Double.parseDouble(next());}
    public void close() {
        try {in.close();}
        catch (IOException e) {}
    }
}
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