#include<bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
ll readint(){
ll x=0,f=1; char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
return x*f;
}
int n,m,q;
int v[1500005][2],fa[1500005],ch[1500005][2],tag[1500005][2],prior[1500005];
mt19937 rng(time(0));
void make(int id){ tag[id][0]=tag[id][1]=-1; prior[id]=rng(); fa[id]=ch[id][0]=ch[id][1]=0; }
void pushdown(int id){
if(id<=0) return;
for(int i=0;i<2;i++){
if(tag[id][i]==-1) continue;
for(int j=0;j<2;j++){
if(ch[id][j]==0) continue;
v[ch[id][j]][i]=tag[id][i];
tag[ch[id][j]][i]=tag[id][i];
}
tag[id][i]=-1;
}
}
void split(int id,int&l,int&r,int a,int b){
if(id<=0) return (void)(l=r=0);
pushdown(id);
if(v[id][0]<=a&&v[id][1]<=b){
fa[ch[id][1]]=0;
split(ch[id][1],ch[id][1],r,a,b);
l=id;
fa[ch[id][1]]=id;
}else{
fa[ch[id][0]]=0;
split(ch[id][0],l,ch[id][0],a,b);
r=id;
fa[ch[id][0]]=id;
}
}
void merge(int&id,int l,int r){
if(l<=0) return (void)(id=r);
if(r<=0) return (void)(id=l);
pushdown(l);
pushdown(r);
if(prior[l]>prior[r]) swap(l,r);
int L=0,R=0;
split(l,L,R,v[r][0],v[r][1]);
pushdown(L);
pushdown(R);
fa[ch[r][0]]=0;
fa[ch[r][1]]=0;
merge(ch[r][0],ch[r][0],L);
merge(ch[r][1],ch[r][1],R);
fa[ch[r][0]]=r;
fa[ch[r][1]]=r;
id=r;
pushdown(id);
}
int main(){
n=readint();
m=readint();
q=readint();
for(int i=1;i<=m;i++) for(int j=0;j<2;j++) v[i][j]=readint();
for(int i=1;i<=m;i++) make(i);
while(q--){
int t=readint();
if(t==1){
int i=readint();
vector<int> anc;
for(int v=i;v;v=fa[v],iter++) anc.pb(v);
reverse(anc.begin(),anc.end());
for(int v:anc) pushdown(v);
printf("%d %d\n",v[i][0],v[i][1]);
}
if(t==2){
int l=readint();
int root=0;
for(int i=1;i<=m;i++){
if(fa[i]) continue;
int L=0,R=0;
split(i,L,R,n-l,l);
v[L][0]=n-l;
tag[L][0]=n-l;
pushdown(L);
pushdown(R);
fa[L]=fa[R]=0;
merge(root,root,L);
pushdown(root);
fa[root]=0;
}
}
if(t==3){
int l=readint();
int root=0;
for(int i=1;i<=m;i++){
if(fa[i]) continue;
int L=0,R=0;
split(i,L,R,l,n-l);
v[L][1]=n-l;
tag[L][1]=n-l;
pushdown(L);
pushdown(R);
fa[L]=fa[R]=0;
merge(root,root,L);
pushdown(root);
fa[root]=0;
}
}
if(t==4){
make(++m);
for(int j=0;j<2;j++) v[m][j]=readint();
}
}
return 0;
}
Compilation message
sweeping.cpp: In function 'int main()':
sweeping.cpp:92:26: error: 'iter' was not declared in this scope
92 | for(int v=i;v;v=fa[v],iter++) anc.pb(v);
| ^~~~
