mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
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48 lines
1.6 KiB
Plaintext
48 lines
1.6 KiB
Plaintext
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//<2F><><EFBFBD>ں<EFBFBD><DABA><EFBFBD>
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char *week[] = {"monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"};
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int days[12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
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struct Date { int y, m, d; };
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//<2F><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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inline int leap(int y) {
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return (y % 4 == 0 && y % 100 != 0) || y % 400 == 0;
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}
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//<2F>кϷ<D0BA><CFB7><EFBFBD>
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inline bool legal(Date &a) {
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if (a.m < 0 || a.m > 12) { return false; }
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if (a.m == 2) { return a.d > 0 && a.d <= 28 + leap(a.y); }
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return a.d > 0 && a.d <= days[a.m - 1];
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}
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//<2F>Ƚ<EFBFBD><C8BD><EFBFBD><EFBFBD>ڴ<EFBFBD>С
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inline int datecmp(Date &a, Date &b) {
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if (a.y != b.y) { return a.y - b.y; }
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if (a.m != b.m) { return a.m - b.m; }
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return a.d - b.d;
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}
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//<2F><><EFBFBD><EFBFBD>ָ<EFBFBD><D6B8><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڼ<EFBFBD>
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int DaysOfTheWeek(Date a) {
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if (a.m == 1 || a.m == 2) { a.m += 12; a.y--; } //1<><31>2<EFBFBD>µ<EFBFBD><C2B5><EFBFBD>ǰһ<C7B0><D2BB><EFBFBD><EFBFBD>13, 14<31><34>
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//<2F>ж<EFBFBD><D0B6>Ƿ<EFBFBD><C7B7><EFBFBD>1752<35><32>9<EFBFBD><39>3<EFBFBD><33>֮ǰ
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if (a.y < 1752 || (a.y == 1752 && a.m < 9) || (a.y == 1752 && a.m == 9 && a.d < 3)) {
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return (a.d + 2 * a.m + 3 * (a.m + 1) / 5 + a.y + a.y / 4 + 5) % 7;
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} else {
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return (a.d + 2 * a.m + 3 * (a.m + 1) / 5 + a.y + a.y / 4 - a.y / 100 + a.y / 400) % 7;
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}
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}
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//<2F><><EFBFBD><EFBFBD>ת<EFBFBD><D7AA><EFBFBD><EFBFBD>ƫ<EFBFBD><C6AB>
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int date2int(Date a) {
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int ret = a.y * 365 + (a.y - 1) / 4 - (a.y - 1) / 100 + (a.y - 1) / 400;
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days[1] += leap(a.y);
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for (int i = 0; i < a.m - 1; ret += days[i++]);
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days[1] = 28;
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return ret + a.d;
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}
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//<2F><><EFBFBD><EFBFBD>ƫ<EFBFBD><C6AB>ת<EFBFBD><D7AA><EFBFBD><EFBFBD>
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Date int2date(int a) {
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Date ret; ret.y = a / 146097 * 400;
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for (a %= 146097; a >= 365 + leap(ret.y); a -= 365 + leap(ret.y), ret.y++);
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days[1] += leap(ret.y);
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for (ret.m = 1; a >= days[ret.m - 1]; a -= days[ret.m - 1], ret.m++);
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days[1] = 28; ret.d = a + 1;
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return ret;
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}
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