poj2080

#include<iostream>
using namespace std;
const char wstr[][20]={"Saturday","Sunday","Monday","Tuesday","Wednesday","Thursday","Friday"};

int days_of_year(int year)
{
	if(year%400==0||(year%4==0&&year%100!=0))
	  return 366;
	return 365;
}

int days_of_month(int month,int year)
{
	if(month==2&&days_of_year(year)==366) return 29;
	switch(month)
	{
		case 1:case 3:case 5: case 7: case 8: case 10: case 12:
			return 31;
		case 4: case 6: case 9: case 11:
			return 30;
		case 2:
			return 28;
	}
}

int main()
{
	int n;
	cin>>n;
	int year,month,day,weak;
	while(n!=-1){
		year=2000;month=1;day=1;weak=n%7;
		n++;//下面的运算实际上是从1月0日开始，这里补一 
			while(n>days_of_year(year)){
			  n-=days_of_year(year);
			  year++;
		    }
		    while(n>days_of_month(month,year)){
		    	n-=days_of_month(month,year);
		    	month++;
		    }
		    day=n;
		    cout<<year<<"-"<<(month>=10?"":"0")<<month<<"-"<<(day>=10?"":"0")<<day<<" "<<wstr[weak]<<endl;//?:处理时用字符串不能用空字符 
		cin>>n;
	}
	return 0;
}