改了一下后输出和数据一样还是RE
```cpp
#include<bits/stdc++.h>
using namespace std;
struct node{
int last,next;
bool pd=1;
}xs[100001];
void read(int &x)
{
int f=1;
x=0;
char ch=getchar();
if(ch<'0'||ch>'9')
{
f=-1;
ch=getchar();
}
while(ch>='0'&&ch<='9')
{
x*=10;
x+=ch-'0';
ch=getchar();
}
x*=f;
}
int main()
{
int n,t=1;
xs[1].next=0;
xs[1].last=0;
read(n);
for(int i=2;i<=n;i++)
{
int k,p;
read(k);
read(p);
if(k==t&&p==0)
{
t=i;
}
if(p==0)
{
if(xs[k].last==0)
{
xs[k].last=i;
xs[i].next=k;
}
else
{
xs[i].last=xs[k].last;
xs[xs[k].last].next=i;
xs[i].next=k;
xs[k].last=i;
}
}
else
{
if(xs[k].next==0)
{
xs[k].next=i;
xs[i].last=k;
}
else
{
xs[i].next=xs[k].next;
xs[xs[k].next].last=i;
xs[i].last=k;
xs[k].next=i;
}
}
}
int m;
read(m);
for(int i=1;i<=m;i++)
{
int x;
read(x);
if(x==t)
{
t=xs[x].next;
}
if(xs[x].pd)
{
xs[xs[x].last].next=xs[x].next;
xs[xs[x].next].last=xs[x].last;
xs[x].pd=0;
}
}
while(t!=0)
{
printf("%d ",t);
t=xs[t].next;
}
return 0;
}
``````
by ycy1124 @ 2024-04-06 11:23:06
@[ycy1124](/user/1199534) 请不要使用 `next` 作为变量名，可以换为 `nxt` 等。
by WhileTrueRP @ 2024-04-06 11:28:11
@[ycy1124](/user/1199534) `next` 为 `C++` 关键字。
by WhileTrueRP @ 2024-04-06 11:29:18
@[WhileTrueRP](/user/373198)
改了还是RE
```cpp
#include<bits/stdc++.h>
using namespace std;
struct node{
int L,N;
bool pd=1;
}xs[100001];
void read(int &x)
{
int f=1;
x=0;
char ch=getchar();
if(ch<'0'||ch>'9')
{
f=-1;
ch=getchar();
}
while(ch>='0'&&ch<='9')
{
x*=10;
x+=ch-'0';
ch=getchar();
}
x*=f;
}
int main()
{
int n,t=1;
xs[1].N=0;
xs[1].L=0;
read(n);
for(int i=2;i<=n;i++)
{
int k,p;
read(k);
read(p);
if(k==t&&p==0)
{
t=i;
}
if(p==0)
{
if(xs[k].L==0)
{
xs[k].L=i;
xs[i].N=k;
}
else
{
xs[i].L=xs[k].L;
xs[xs[k].L].N=i;
xs[i].N=k;
xs[k].L=i;
}
}
else
{
if(xs[k].N==0)
{
xs[k].N=i;
xs[i].L=k;
}
else
{
xs[i].N=xs[k].N;
xs[xs[k].N].L=i;
xs[i].L=k;
xs[k].N=i;
}
}
}
int m;
read(m);
for(int i=1;i<=m;i++)
{
int x;
read(x);
if(x==t)
{
t=xs[x].N;
}
if(xs[x].pd)
{
xs[xs[x].L].N=xs[x].N;
xs[xs[x].N].L=xs[x].L;
xs[x].pd=0;
}
}
while(t!=0)
{
printf("%d ",t);
t=xs[t].N;
}
return 0;
}
``````
by ycy1124 @ 2024-04-06 11:37:11
快读有问题
by xuzihao12345 @ 2024-04-24 19:19:05