#include<stdio.h>
int main(){
	int flag=0;
	while(flag==0){
	
	printf("menu  \n");
	printf("1:查询某年某月某日的日期是周几\n");
	printf("2:该年是否为闰年\n");
	printf("3:输出这一年的日历\n");
	printf("4:退出\n");
	
	
		char x[1];
			scanf("%s",&x[1]);
	
	
	
	if(x[1]!=49&&x[1]!=50&&x[1]!=51&&x[1]!=52)
	printf("输入有误，请重新输入\n");
	
	
	if(x[1]==49){
		int w,d,m,y;
		printf("请输入年 月 日\n");
		scanf("%d%d%d",&y,&m,&d);
		if(y<0||m<0||d<0||m>12||((m==1||m==3||m==5||m==7||m==8||m==10||m==12)&&d>31)||((m==2||m==4||m==9||m==11)&&d>30)||((y%4==0&&y%100!=0||y%400==0)&&m==2&&d>29)||(y==1582&&m==10&&(d==5||d==6||d==7||d==8||d==9||d==10||d==11||d==12||d==13||d==14))){
			printf("日期不存在,请重新输入\n");
		}
		else{
		if(y<=1582&&m<=10&&d<=4){
				if(m==1||m==2){
			y--;
			m+=12;
		}
			w = (d+1+2*m+3*(m+1)/5+y+y/4+5) % 7;
		}
		else{
			
			if(m==1||m==2){
			y--;
			m+=12;
		}
		
		w = (d + 1+ 2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7;}
		switch(w){
			case 0:printf("星期日\n");break;
			case 1:printf("星期一\n");break;
			case 2:printf("星期二\n");break;
			case 3:printf("星期三\n");break;
			case 4:printf("星期四\n");break;
			case 5:printf("星期五\n");break;
			case 6:printf("星期六\n");break;

		}
		}
	}
	if(x[1]==50){
	    int n;
	    printf("请输入年份\n");
	    scanf("%d",&n);
	    if(n%4==0&&n%100!=0||n%400==0){
	        printf("%d年是闰年\n",n);
	    }
	    else{
	        printf("%d年不是闰年\n",n);
	    }
	}
	if(x[1]==51){
		int y;
		printf("请输入年份\n");
		scanf("%d",&y);
		if(y<=0){
			printf("输入有误，请重新输入\n");
		}
		else{
			printf("1:单列输出\n2:双列输出\n");
			int n,m,w,j,d,s,m1,m2,w1,w2,s1,s2,d1,d2,j1,j2;
			scanf("%d",&n);
			if(n==1){
				printf("%d年\n",y);
				for(m=1;m<=12;m++){
					printf("%d月\n",m);
		if(y<=1582&&m<=10){
				if(m==1||m==2){
			y--;
			m+=12;
		}
			w = (1+1+2*m+3*(m+1)/5+y+y/4+5) % 7;
		}
		else{
			
			if(m==1||m==2){
			y--;
			m+=12;
		}
		
	w = (1 + 1+ 2*m+3*(m+1)/5+y+y/4-y/100+y/400)%7;}
				if(m==13||m==14){
					y++;
					m-=12;
				}
				int month_days[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
				if(y%4==0&&y%100!=0||y%400==0){
					month_days[2]=29;
				}
				s=month_days[m];
					printf(" sum mon tue wed thu fri sat\n");
					for(j=0;j<w;j++){
						printf("    ");
					}
					
					for(d=1;d<=s;d++){
						if(y==1582&&m==10&&d>=5&&d<=14)
						continue;
						

						
						
						printf("%4d",d);
						
						
						if(y==1582&&m==10){
							
							if(d==16||d==23||d==30){
							

							
							printf("\n");
						}
							
						}
						
						
						else if((d+w)%7==0){
							

							
							printf("\n");
						}
					}
					if((s+w)%7!=0){
						printf("\n");
					}
				}
			}
			else if(n==2){
				printf("%d年\n",y);
				for(m1=1,m2=2;m1<=11,m2<=12;m1+=2,m2+=2){
					
					int aaa=1,cnt=1;
					
					printf("%d月							%d月\n",m1,m2);
		if(y<=1582&&m1<=10){
				if(m1==1||m1==2){
			y--;
			m1+=12;
		}
			w1 = (1+1+2*m1+3*(m1+1)/5+y+y/4+5) % 7;
		}
		else{
			
			if(m1==1||m1==2){
			y--;
			m1+=12;
		}
		
	w1 = (1 + 1+ 2*m1+3*(m1+1)/5+y+y/4-y/100+y/400)%7;}
				if(m1==13||m1==14){
					y++;
					m1-=12;
				}
				
		if(y<=1582&&m2<=10){
				if(m2==1||m2==2){
			y--;
			m2+=12;
		}
			w2 = (1+1+2*m2+3*(m2+1)/5+y+y/4+5) % 7;
		}
		else{
			
			if(m2==1||m2==2){
			y--;
			m2+=12;
		}
		
	w2 = (1 + 1+ 2*m2+3*(m2+1)/5+y+y/4-y/100+y/400)%7;}
				if(m2==13||m2==14){
					y++;
					m2-=12;
				}

				
				
				
				
				
				int month_days[]={0,31,28,31,30,31,30,31,31,30,31,30,31};
				if(y%4==0&&y%100!=0||y%400==0){
					month_days[2]=29;
				}
				s1=month_days[m1];
				s2=month_days[m2];
					printf(" sum mon tue wed thu fri sat				 sum mon tue wed thu fri sat\n");
					
					
					
					
					
					
					
					
					
					
					
					
					
					
					for(j1=0;j1<w1;j1++){
						printf("    ");
					}
					
					for(d1=1;d1<=s1;d1++){
						if(y==1582&&m1==10&&d1>=5&&d1<=14)
						continue;
																																																																																																																																																																
																																																																																																																																																										
																																																																																																																																																																
																																																																																																																																																																
						printf("%4d",d1);
						
						
						if(y==1582&&m1==10){
							
							if(d1==16||d1==23||d1==30){
							

							
							printf("						");
							
							
							
							
							
							
							
						}
							
						}
						
						
						else if((d1+w1)%7==0){
							

							
							printf("				");
							
							
							
												while(aaa){
												
												for(j2=0;j2<w2;j2++){
													printf("    ");
												}
												aaa--;
												}
					
													for(d2=cnt;d2<=s2;d2++){
												if(y==1582&&m2==10&&d2>=5&&d2<=14)
													continue;
						

						
						
													printf("%4d",d2);
						
						
														if(y==1582&&m2==10){
							
														if(d2==16||d2==23||d2==30){
							

							
														printf("\n");
														}
							
														}
								
						
													else if((d2+w2)%7==0){
							

							
															cnt=d2+1;
															printf("\n");
															break;
															
															if(cnt!=d2){
															
															printf("\n");}
																}
															}

								}
							
						
							
							
						}
						if((s1+w1)%7!=0){
						
						
						for(j1=0;j1<7-(s1+w1)%7;j1++){
						
						
						printf("    ");
					}
							
							
						printf("				\n");
						
											if((s2+w2)%7!=0){
											printf("\n");
									}
						
					}
					
					
					
					}
					printf("\n");
				}
			}
		}		
				
	
	if(x[1]==52){
		flag++;
	}
}
}