結果
問題 | No.87 Advent Calendar Problem |
ユーザー | uafr_cs |
提出日時 | 2015-08-17 03:04:39 |
言語 | Java19 (openjdk 21) |
結果 |
AC
|
実行時間 | 229 ms / 5,000 ms |
コード長 | 3,471 bytes |
コンパイル時間 | 2,503 ms |
コンパイル使用メモリ | 73,864 KB |
実行使用メモリ | 55,992 KB |
最終ジャッジ日時 | 2023-09-25 12:30:56 |
合計ジャッジ時間 | 7,819 ms |
ジャッジサーバーID (参考情報) |
judge11 / judge14 |
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 | 167 ms
55,836 KB |
testcase_01 | AC | 201 ms
55,748 KB |
testcase_02 | AC | 151 ms
55,904 KB |
testcase_03 | AC | 121 ms
53,696 KB |
testcase_04 | AC | 121 ms
55,868 KB |
testcase_05 | AC | 124 ms
55,764 KB |
testcase_06 | AC | 174 ms
55,716 KB |
testcase_07 | AC | 184 ms
55,652 KB |
testcase_08 | AC | 166 ms
55,992 KB |
testcase_09 | AC | 184 ms
55,760 KB |
testcase_10 | AC | 189 ms
55,856 KB |
testcase_11 | AC | 198 ms
55,716 KB |
testcase_12 | AC | 210 ms
55,672 KB |
testcase_13 | AC | 192 ms
55,708 KB |
testcase_14 | AC | 229 ms
55,876 KB |
testcase_15 | AC | 174 ms
55,876 KB |
testcase_16 | AC | 143 ms
55,880 KB |
testcase_17 | AC | 121 ms
55,760 KB |
testcase_18 | AC | 120 ms
55,864 KB |
testcase_19 | AC | 122 ms
55,620 KB |
testcase_20 | AC | 189 ms
55,868 KB |
testcase_21 | AC | 177 ms
55,972 KB |
testcase_22 | AC | 170 ms
55,484 KB |
testcase_23 | AC | 163 ms
55,772 KB |
testcase_24 | AC | 169 ms
55,676 KB |
testcase_25 | AC | 148 ms
55,900 KB |
testcase_26 | AC | 225 ms
55,908 KB |
ソースコード
import java.util.Scanner; public class Main { public static long simulate_count(final long begin, final long end, final int init_days, final int correct){ int days = init_days; long count = 0; for(long year = begin; year < end; year++){ if(year % 400 == 0){ days += 2; }else if(year % 100 == 0){ days += 1; }else if(year % 4 == 0){ days += 2; }else{ days += 1; } days %= 7; if(days == correct){ count++; } } return count; } public static int simulate_days(final long begin, final long end, final int init_days, final int correct){ int days = init_days; long count = 0; for(long year = begin; year < end; year++){ if(year % 400 == 0){ days += 2; }else if(year % 100 == 0){ days += 1; }else if(year % 4 == 0){ days += 2; }else{ days += 1; } days %= 7; if(days == correct){ count++; } } return days; } public static boolean is_leap(long year){ if(year % 400 == 0){ return true; }else if(year % 100 == 0){ return false; }else if(year % 4 == 0){ return true; }else{ return false; } } public static void main(String[] args){ Scanner sc = new Scanner(System.in); final long N = sc.nextLong(); final int DAYS = 7; final int correct_days = 3; int days = 3; int[] numbered = {1, 4, 100, 400}; long[][][] counts = new long[2][numbered.length][DAYS]; int[][][] next_days = new int[2][numbered.length][DAYS]; boolean[][][] memoized = new boolean[2][numbered.length][DAYS]; long answer = 0; for(long year = 2015; year <= N; ){ final boolean is_leap = is_leap(year); if(year % 400 == 0 && (year + 400) <= N){ if(!memoized[is_leap ? 1 : 0][3][days]){ memoized[is_leap ? 1 : 0][3][days] = true; counts[is_leap ? 1 : 0][3][days] = simulate_count(year, year + 400, days, correct_days); next_days[is_leap ? 1 : 0][3][days] = simulate_days(year, year + 400, days, correct_days); } answer += counts[is_leap ? 1 : 0][3][days]; days = next_days[is_leap ? 1 : 0][3][days]; year += 400; }else if(year % 100 == 0 && (year + 100) <= N){ if(!memoized[is_leap ? 1 : 0][2][days]){ memoized[is_leap ? 1 : 0][2][days] = true; counts[is_leap ? 1 : 0][2][days] = simulate_count(year, year + 100, days, correct_days); next_days[is_leap ? 1 : 0][2][days] = simulate_days(year, year + 100, days, correct_days); } answer += counts[is_leap ? 1 : 0][2][days]; days = next_days[is_leap ? 1 : 0][2][days]; year += 100; }else if(year % 4 == 0 && (year + 4) <= N){ if(!memoized[is_leap ? 1 : 0][1][days]){ memoized[is_leap ? 1 : 0][1][days] = true; counts[is_leap ? 1 : 0][1][days] = simulate_count(year, year + 4, days, correct_days); next_days[is_leap ? 1 : 0][1][days] = simulate_days(year, year + 4, days, correct_days); } answer += counts[is_leap ? 1 : 0][1][days]; days = next_days[is_leap ? 1 : 0][1][days]; year += 4; }else{ if(!memoized[is_leap ? 1 : 0][0][days]){ memoized[is_leap ? 1 : 0][0][days] = true; counts[is_leap ? 1 : 0][0][days] = simulate_count(year, year + 1, days, correct_days); next_days[is_leap ? 1 : 0][0][days] = simulate_days(year, year + 1, days, correct_days); } answer += counts[is_leap ? 1 : 0][0][days]; days = next_days[is_leap ? 1 : 0][0][days]; year += 1; } } System.out.println(answer); } }