> #include<stdio.h>
> //#include<math.h>
> int main()
> {
> 	long i,num,num_4,year,mon,day,week,k,m; 
> 	long ping[12]={0,31,59,90,120,151,181,212,243,273,304,334};
> 	long  yun[12]={0,31,60,91,121,152,182,213,244,274,305,335};
> 	while(1)
> 	{
> 		scanf("%d",&num);
> 		if( num==-1)
> 			break;
> 		k=num/(365*4+1);
> 		num_4=num - (365*4+1)*k;
> 		if( num_4<=365 )
> 			m=0;
> 		else  if( num_4<=366+365 )
> 			m=1;
> 		else  if( num_4<=366+365+365 )
> 			m=2;
> 		else  
> 			m=3;
> 		year=2000 + m + 4*k;
> 		if(num_4>365)
> 		{
> 			mon=(num_4-366)%365;
> 			for( i=0; i<12 && mon>=ping[i]; i++ )
> 				;
> 			day=mon-ping[i-1]+1;
> 			mon=i;
> 		}
> 		else 
> 		{
> 			mon=num_4;
> 			for( i=0; i<12 && mon>=yun[i]; i++ )
> 				;
> 			day=mon-yun[i-1]+1;
> 			mon=i;
> 		}
> 		week=(num+6)%7;
> 		switch(week)
> 		{
> 		case 0: printf("%04d-%02d-%02d Sunday\n",year,mon,day);break;
> 		case 1: printf("%04d-%02d-%02d Monday\n",year,mon,day);break;
> 		case 2: printf("%04d-%02d-%02d Tuesday\n",year,mon,day);break;
> 		case 3: printf("%04d-%02d-%02d Wednesday\n",year,mon,day);break;
> 		case 4: printf("%04d-%02d-%02d Thursday\n",year,mon,day);break;
> 		case 5: printf("%04d-%02d-%02d Friday\n",year,mon,day);break;
> 		case 6: printf("%04d-%02d-%02d Saturday\n",year,mon,day);break;
> 		}
> 	}
> 	return 0;
> }	
> 
>