BJFUOJ：删除链表中绝对值相等的结点

BJFUOJ：删除链表中绝对值相等的结点

#include
using namespace std;
set <int> s;
typedef struct Lnode {
	int data;
	struct Lnode *next;
} Lnode, *Linklist;

void Init_Linklist(Linklist &l) {
	l = new Lnode;
	l->next = NULL;
}

void Creat_Linklist(Linklist &l, int n) {
	Linklist p = l;
	Linklist r;
	for (int i = 0; i < n; i++) {
		r = new Lnode;
		cin>>r->data;
		r->next = p->next;
		p->next = r;
		p = r;
	}
}

void DelEqu(Linklist &l){
	Linklist pre = l,p = l->next;
	while(p){
		if(s.count(abs(p->data)) == 0){
			s.insert(abs(p->data));
			pre = p;
			p = p->next;
		}else{
			pre->next = p->next;
			p = p->next;
		}
	}
}

void Out(Linklist &l){
	Linklist p = l->next;
	while(p->next){
		cout<<p->data<<" ";
		p = p->next;
	}
	cout<<p->data<<endl;
}
int main() {
	while(1){
		s.clear();
		int n;
		cin>>n;
		if(n == 0) break;
		Linklist l;
		Init_Linklist(l);
		Creat_Linklist(l,n);
		DelEqu(l);
		Out(l);
	}
	return 0;
}