結果

問題 No.87 Advent Calendar Problem
ユーザー uwiuwi
提出日時 2014-12-07 18:23:36
言語 Java21
(openjdk 21)
結果
AC  
実行時間 228 ms / 5,000 ms
コード長 3,908 bytes
コンパイル時間 2,450 ms
コンパイル使用メモリ 80,024 KB
実行使用メモリ 52,356 KB
最終ジャッジ日時 2023-09-02 09:15:08
合計ジャッジ時間 7,216 ms
ジャッジサーバーID
（参考情報） 		judge11 / judge13
このコードへのチャレンジ
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テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 126 ms
51,956 KB
testcase_01 AC 185 ms
52,040 KB
testcase_02 AC 98 ms
52,032 KB
testcase_03 AC 62 ms
50,540 KB
testcase_04 AC 62 ms
50,780 KB
testcase_05 AC 60 ms
50,784 KB
testcase_06 AC 136 ms
52,056 KB
testcase_07 AC 157 ms
51,824 KB
testcase_08 AC 122 ms
51,844 KB
testcase_09 AC 142 ms
51,880 KB
testcase_10 AC 159 ms
51,768 KB
testcase_11 AC 188 ms
51,780 KB
testcase_12 AC 209 ms
51,860 KB
testcase_13 AC 173 ms
51,740 KB
testcase_14 AC 228 ms
52,004 KB
testcase_15 AC 138 ms
51,984 KB
testcase_16 AC 73 ms
50,500 KB
testcase_17 AC 66 ms
50,904 KB
testcase_18 AC 63 ms
50,492 KB
testcase_19 AC 61 ms
50,740 KB
testcase_20 AC 165 ms
51,976 KB
testcase_21 AC 148 ms
51,896 KB
testcase_22 AC 129 ms
51,732 KB
testcase_23 AC 116 ms
52,020 KB
testcase_24 AC 127 ms
52,356 KB
testcase_25 AC 92 ms
51,772 KB
testcase_26 AC 227 ms
51,796 KB
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 # 

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.InputMismatchException;

public class Main {
	static InputStream is;
	static PrintWriter out;
	static String INPUT = "";
	
	static void solve()
	{
		long n = nl();
		int delta = 0;
		int[] f = new int[7];
		for(int i = 2015;i < 2015+400;i++){
			delta = (delta + 1 + (i % 4 == 0 && (i % 100 != 0 || i % 400 == 0) ? 1 : 0)) % 7;
			f[delta]++;
		}
		
		long ret = 0;
		int gd = 0;
		long i;
		for(i = 2015;i+400 < n;i += 400){
			ret += f[(7-gd)%7];
			gd = (gd+delta) % 7;
		}
		delta = gd;
		for(;i <= n;i++){
			delta = (delta + 1 + (i % 4 == 0 && (i % 100 != 0 || i % 400 == 0) ? 1 : 0)) % 7;
			if(delta == 0)ret++;
		}
		out.println(ret);
	}
	
	public static void main(String[] args) throws Exception
	{
		long S = System.currentTimeMillis();
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		solve();
		out.flush();
		long G = System.currentTimeMillis();
		tr(G-S+"ms");
	}
	
	private static boolean eof()
	{
		if(lenbuf == -1)return true;
		int lptr = ptrbuf;
		while(lptr < lenbuf)if(!isSpaceChar(inbuf[lptr++]))return false;
		
		try {
			is.mark(1000);
			while(true){
				int b = is.read();
				if(b == -1){
					is.reset();
					return true;
				}else if(!isSpaceChar(b)){
					is.reset();
					return false;
				}
			}
		} catch (IOException e) {
			return true;
		}
	}
	
	private static byte[] inbuf = new byte[1024];
	static int lenbuf = 0, ptrbuf = 0;
	
	private static int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private static boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private static int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private static double nd() { return Double.parseDouble(ns()); }
	private static char nc() { return (char)skip(); }
	
	private static String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private static char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private static char[][] nm(int n, int m)
	{
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private static int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private static int ni()
	{
		int num = 0, b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { if(INPUT.length() != 0)System.out.println(Arrays.deepToString(o)); }
}
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