This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include<bits/stdc++.h>
using namespace std;
const int N=2200009;
int a,b,c,d,e,i,j,ii,jj,zx,xc,tes,t,za,seg[N],seg2[N],seg3[N];
char ch;
multiset <int> lf[N],rg[N],mn,mx;
void up(int q){
if(q==0) return;
if(seg[q*2]==-1||seg[q*2+1]==-1){
seg[q]=max(seg[q*2],seg[q*2+1]);
}else{
seg[q]=min(seg[q*2],seg[q*2+1]);
}
seg2[q]=max(seg2[q*2],seg2[q*2+1]);
if(seg3[q*2]==-1||seg3[q*2+1]==-1){
seg3[q]=max(seg3[q*2],seg3[q*2+1]);
}else{
seg3[q]=min(seg3[q*2],seg3[q*2+1]);
}
int qw=seg3[q*2+1]-seg2[q*2];
if(qw>0){
if(seg[q]>qw||seg[q]==-1) seg[q]=qw;
}
up(q/2);
}
void upd(int q){
multiset <int>::iterator it,tt,zit,ztt;
if(lf[q].size()==0||rg[q].size()==0){
seg[q+za-1]=-1;
}else{
it=lf[q].end();it--;
tt=rg[q].begin();
seg[q+za-1]=(*tt)-(*it);
}
if(lf[q].size()==0){
seg2[q+za-1]=-1;
}else{
it=lf[q].end();it--;
seg2[q+za-1]=(*it);
}
if(rg[q].size()==0){
seg3[q+za-1]=-1;
}else{
it=rg[q].begin();
seg3[q+za-1]=(*it);
}
up((q+za-1)/2);
}
int main(){
ios_base::sync_with_stdio(false),cin.tie(0),cout.tie(0);
cin>>tes;
za=1;
while(za<1000000) za*=2;
for(i=1; i<=za*2; i++){
seg[i]=-1;
seg2[i]=seg3[i]=-1;
}
for(t=1; t<=tes; t++){
cin>>ch>>c>>d;
if(ch=='A'){
lf[d].insert(c);
rg[c].insert(d);
mn.insert(d);
mx.insert(c);
}else{
lf[d].erase(lf[d].lower_bound(c));
rg[c].erase(rg[c].lower_bound(d));
mn.erase(mn.lower_bound(d));
mx.erase(mx.lower_bound(c));
}
upd(c);
upd(d);
multiset <int>::iterator it,tt,zit,ztt;
it=mn.begin();
tt=mx.end();tt--;
if((*tt)<(*it)){
c=(*tt);d=(*it);
zit=lf[d].end();zit--;
ztt=rg[c].begin();
cout<<(*ztt)-(*zit)<<endl;
}else{
cout<<seg[1]<<endl;
}
}
return 0;
}
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