题目描述

链表的练习题，自己对于此类题练习较少，需要在今后多加练习，此题代码量也较大，需要在日后多加练习

#include<cstdio>
struct node{
    
    
	int size;
	node *pre,*post;
	node *down;
	char a,b;
	node():pre(NULL),post(NULL),down(NULL),size(1){
    
    
	}
};

inline void insertNode(node *&m,node *&n){
    
    
	n->post=m->post;
	n->pre=m->pre;
	if(m->post) m->post->pre=n;
	if(m->pre) m->pre->post=n;
}

inline void takeoutNode(node *&n){
    
    
	if(n->down){
    
    
		node *down=n->down;
		insertNode(n,down);
		return;
	}
	if(n->pre) n->pre->post=n->post;
	if(n->post) n->post->pre=n->pre;
}
inline void inStackNode(node *&m,node *&n){
    
    
	n->size=m->size+1;
	insertNode(m,n);
	n->down=m;
}
inline bool checkMovable(node *&n,node *&m){
    
    
	return n->a==m->a||n->b==m->b;
}
inline void pre3(node *&n){
    
    
	if(n->pre) n=n->pre;
	if(n->pre) n=n->pre;
	if(n->pre) n=n->pre;
}
inline void pre1(node *&n){
    
    
	if(n->pre) n=n->pre;
}
inline void deleteNode(node *&n){
    
    
	while(n){
    
    
		node *p=n->post;
		while(n){
    
    
			node *d=n->down;
			delete n;n=NULL;
			n=d;
		}
		n=p;
	}
}
int main(){
    
    
	node *head=new node();
	while(true){
    
    
		node *it=new node();
		it->a=getchar();
		if(it->a=='#') break;
		it->b=getchar();
		getchar();
		head->post=it;
		it->pre=head;
		for(int i=1;i<52;i++){
    
    
			node *p=new node();
			p->a=getchar();
			p->b=getchar();
			getchar();
			it->post=p;
			p->pre=it;
			it=p;
		}
		bool checkMove=true;
		while(checkMove){
    
    
			checkMove=false;
			it=head->post;
			while(it){
    
    
				node *post=it->post;
				node *p=it;
				pre3(p);
				if(p&&p!=head&&checkMovable(p,it)){
    
    
					checkMove=true;
					takeoutNode(it);
					inStackNode(p,it);
					break;
				}
				p=it;
				pre1(p);
				if(p&&p!=head&&checkMovable(p,it)){
    
    
					checkMove=true;
					takeoutNode(it);
					inStackNode(p,it);
					break;
				}
				it=post;
			}
		}
		it=head->post;
		int piles=0;
		while(it){
    
    
			piles++; 
			it=it->post;
		}
		printf("%d piles remaining:",piles);
		it=head->post;
		while(it){
    
    
			printf(" %d",it->size);
			it=it->post;
		}
		printf("\n");
		delete(head->post);
	}
	delete head;
	return 0;
}