0027 - What day is today?
#include <iostream> using namespace std; int Zeller(int year, int month, int day) { if (month==1 || month==2) { --year; month+=12; } return (year+year/4-year/100+year/400+(13*month+8)/5+day)%7; } void Slove(int month, int day) { string date[7]={"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"}; cout << date[Zeller(2004,month,day)] << endl; } int main(void) { int month, day; while (cin >> month >> day && month) Slove(month,day); return 0; }
ツェラーの公式一発でした。。