CheZiHe929 @ 2024-01-28 17:01:56
#include<bits/stdc++.h>
#define int long long
#define endl '\n'
const int MAXN=4e5+5;
int n,m,k,x[MAXN],y[MAXN],kkk[MAXN];
bool f[MAXN];//1 shan
int ans[MAXN],num;
int fa[MAXN];
std::vector<int> v[MAXN];
void add(int s,int e){v[s].push_back(e);v[e].push_back(s);}
void init(){for(int i=1;i<=n;i++)fa[i]=i;}
int find(int x){return x==fa[x]?x:fa[x]=find(fa[x]);}
void merge(int x,int y){int fx=find(x),fy=find(y);if(fx!=fy){num--;fa[fy]=fx;}}
signed main(){
std::ios::sync_with_stdio(false);
std::cin.tie(0);
init();
std::cin>>n>>m;
for(int i=1;i<=m;i++){
std::cin>>x[i]>>y[i];
add(x[i],y[i]);
}
std::cin>>k;
for(int i=1;i<=k;i++)std::cin>>kkk[i],f[kkk[i]]=1;
num=n-k;
for(int i=1;i<=m;i++)
if(!f[x[i]]&&!f[y[i]])merge(x[i],y[i]);
ans[k+1]=num;
for(int i=k;i>=1;i--){
int x=kkk[i];
num++;
f[x]=0;
for(int j=0;j<v[x].size();j++)
if(!f[v[x][j]])merge(x,v[x][j]);
ans[i]=num;
}
// for(int i=0;i<n;i++)std::cout<<fa[i]<<" \n"[i==n-1];
// for(int j=0;j<v[i].size();j++)
// std::cout<<v[i][j]<<" \n"[j==v[i].size()-1];
for(int i=1;i<=k+1;i++)std::cout<<ans[i]<<endl;
return 0;
}
by CheZiHe929 @ 2024-01-28 18:02:13
此贴结,楼主在没输入 n 之前就初始化/cf/cf/cf