結果
問題 | No.72 そろばん Med |
ユーザー |
|
提出日時 | 2020-03-19 03:42:45 |
言語 | Java (openjdk 23) |
結果 |
AC
|
実行時間 | 56 ms / 5,000 ms |
コード長 | 2,508 bytes |
コンパイル時間 | 2,305 ms |
コンパイル使用メモリ | 78,392 KB |
実行使用メモリ | 50,220 KB |
最終ジャッジ日時 | 2024-12-14 02:58:59 |
合計ジャッジ時間 | 4,835 ms |
ジャッジサーバーID (参考情報) |
judge3 / judge2 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 24 |
ソースコード
import java.io.FileNotFoundException;import java.io.IOException;import java.io.InputStream;import java.util.ArrayDeque;import java.util.Arrays;import java.util.NoSuchElementException;public class Main {public static void main(String[] args) throws FileNotFoundException {long t = System.currentTimeMillis();new Main().run();System.err.println(System.currentTimeMillis() - t);}void run() {Scanner sc = new Scanner();long n=sc.nextLong();long mod=(long)(1e6+7);//n個だと0,1,2,...,nのn+1個表せる。//(a+1)(n-a+1) (0<=a<=n)//=n+na-a^2+1//=-(a-0.5n)^2+...long a;if(n%2==0) {a=n/2%mod;}else {a=(n+1)/2%mod;}n%=mod;System.out.println(((a+1)*((n-a+1)%mod+mod)+mod-1)%mod);}class Scanner {private final InputStream in = System.in;private final byte[] buffer = new byte[1024];private int ptr = 0;private int buflen = 0;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++];elsereturn -1;}private boolean isPrintableChar(int c) {return 33 <= c && c <= 126;}private void skipUnprintable() {while (hasNextByte() && !isPrintableChar(buffer[ptr]))ptr++;}public boolean hasNext() {skipUnprintable();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() {return (int) nextLong();}}static void tr(Object... objects) {System.out.println(Arrays.deepToString(objects));}}