結果
問題 | No.87 Advent Calendar Problem |
ユーザー | xuzijian629 |
提出日時 | 2018-10-30 03:07:53 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 22 ms / 5,000 ms |
コード長 | 3,342 bytes |
コンパイル時間 | 6,700 ms |
コンパイル使用メモリ | 320,816 KB |
実行使用メモリ | 5,376 KB |
最終ジャッジ日時 | 2024-04-30 00:32:07 |
合計ジャッジ時間 | 7,858 ms |
ジャッジサーバーID (参考情報) |
judge1 / judge4 |
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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 | 20 ms
5,248 KB |
testcase_01 | AC | 20 ms
5,376 KB |
testcase_02 | AC | 20 ms
5,376 KB |
testcase_03 | AC | 21 ms
5,376 KB |
testcase_04 | AC | 21 ms
5,376 KB |
testcase_05 | AC | 20 ms
5,376 KB |
testcase_06 | AC | 20 ms
5,376 KB |
testcase_07 | AC | 20 ms
5,376 KB |
testcase_08 | AC | 20 ms
5,376 KB |
testcase_09 | AC | 20 ms
5,376 KB |
testcase_10 | AC | 21 ms
5,376 KB |
testcase_11 | AC | 20 ms
5,376 KB |
testcase_12 | AC | 20 ms
5,376 KB |
testcase_13 | AC | 20 ms
5,376 KB |
testcase_14 | AC | 20 ms
5,376 KB |
testcase_15 | AC | 20 ms
5,376 KB |
testcase_16 | AC | 21 ms
5,376 KB |
testcase_17 | AC | 20 ms
5,376 KB |
testcase_18 | AC | 20 ms
5,376 KB |
testcase_19 | AC | 20 ms
5,376 KB |
testcase_20 | AC | 20 ms
5,376 KB |
testcase_21 | AC | 20 ms
5,376 KB |
testcase_22 | AC | 20 ms
5,376 KB |
testcase_23 | AC | 20 ms
5,376 KB |
testcase_24 | AC | 20 ms
5,376 KB |
testcase_25 | AC | 22 ms
5,376 KB |
testcase_26 | AC | 20 ms
5,376 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using i64 = int64_t; using vi = vector<i64>; using vvi = vector<vi>; class Calendar { regex yyyymmdd = regex("^\\d{4}/\\d{2}/\\d{2}$"); regex mmdd = regex("^\\d{2}/\\d{2}$"); const vvi days = { {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}, {31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31} }; public: // [year1, year2) i64 leap_count(i64 year1, i64 year2) { year2--; year1--; i64 cnt = year2 / 4 - year1 / 4; cnt -= (year2 / 100 - year1 / 100); cnt += (year2 / 400 - year1 / 400); return cnt; } bool is_leap(i64 year) { return year % 400 == 0 || (year % 4 == 0 && year % 100); } i64 date_count(i64 year1, i64 year2) { int c = leap_count(year1, year2); return 365 * (year2 - year1 - c) + 366 * c; } // 0-indexed i64 ith_date(string date, bool is_leap = false) { assert(regex_match(date.begin(), date.end(), mmdd)); int m = stoi(date.substr(0, 2)) - 1; int d = stoi(date.substr(3, 2)) - 1; return accumulate(days[is_leap].begin(), days[is_leap].begin() + m, 0) + d; } // 0-indexed i64 ith_date_posix(string date) { assert(regex_match(date.begin(), date.end(), yyyymmdd)); int y = stoi(date.substr(0, 4)); int m = stoi(date.substr(5, 2)) - 1; int d = stoi(date.substr(8, 2)) - 1; return date_count(1970, y) + ith_date(date.substr(5, 5), is_leap(y)); } string to_string(int date, bool is_leap = false) { int m = 0; while (m < 12 && date - days[is_leap][m] >= 0) { date -= days[is_leap][m++]; } stringstream ss; ss << setw(2) << setfill('0') << m + 1 << "/" << setw(2) << setfill('0') << date + 1; return ss.str(); } string to_string_posix(int date) { int l = 1970, r = 10000; while (l < r - 1) { int m = (l + r) / 2; if (date_count(1970, m) <= date) { l = m; } else { r = m; } } stringstream ss; ss << setw(4) << setfill('0') << l << "/" << to_string(date - date_count(1970, l), is_leap(l)); return ss.str(); } int get_day(int date) { // 0: Sun, 1: Mon, ... // 1970/01/01 is Thu return (date % 7 + 4) % 7; } void check() { for (int i = 0; i < 10000; i++) { string date = to_string_posix(i); assert(ith_date_posix(date) == i); } } }; int main() { Calendar cal; cal.check(); const int period = 5600; vi sum(period + 1); for (int i = 1; i <= period; i++) { stringstream ss; ss << setw(4) << setfill('0') << 2000 + i; int k = cal.ith_date_posix(ss.str() + "/07/23"); if (cal.get_day(k) == 3) { sum[i] = sum[i - 1] + 1; } else { sum[i] = sum[i - 1]; } } i64 n; cin >> n; n -= 2000; if (n <= period) { cout << sum[n] - sum[14] << endl; } else { i64 cnt = sum[period] - sum[14]; i64 range = (n + period - 1) / period - 2; cnt += sum[period] * range; cnt += sum[(n - 1) % period + 1]; cout << cnt << endl; } }