This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2")
#include "bubblesort2.h"
#include<bits/stdc++.h>
using namespace std;
int n,q;
int kaf=(1<<20);
struct segment{
struct node{
int maxa,lazy;
node(){
maxa=lazy=0;
}
};
node seg[(1<<21)];
void calc(int i){
if(i>=kaf){
seg[i].maxa+=seg[i].lazy;
seg[i].lazy=0;
return ;
}
seg[i].maxa=max(seg[(i<<1)].maxa+seg[(i<<1)].lazy,seg[(i<<1)^1].maxa+seg[(i<<1)^1].lazy);
}
void shift(int i){
if(i>=kaf){
calc(i);
return ;
}
seg[(i<<1)].lazy+=seg[i].lazy;
seg[(i<<1)^1].lazy+=seg[i].lazy;
seg[i].lazy=0;
return ;
}
void upd(int i,int l,int r,int tl,int tr,int w){
if(l>r||l>tr||r<tl||tl>tr){
return ;
}
if(l>=tl&&r<=tr){
seg[i].lazy+=w;
shift(i);
calc(i);
return ;
}
int m=(l+r)>>1;
shift(i);
upd((i<<1),l,m,tl,tr,w);
upd((i<<1)^1,m+1,r,tl,tr,w);
calc(i);
}
}seg;
std::vector<int> countScans(std::vector<int> A,std::vector<int> X,std::vector<int> V){
n=A.size(),q=X.size();
vector<pair<int,int>>allind;
for(int i=0;i<n;i++){
allind.push_back(make_pair(A[i],i));
}
for(int i=0;i<q;i++){
allind.push_back(make_pair(V[i],X[i]));
}
sort(allind.begin(),allind.end());
allind.resize(unique(allind.begin(),allind.end())-allind.begin());
int sz=allind.size();
for(int i=0;i<n;i++){
int p=lower_bound(allind.begin(),allind.end(),make_pair(A[i],i))-allind.begin();
seg.upd(1,0,kaf-1,p,p,i);
seg.upd(1,0,kaf-1,p+1,sz,-1);
}
vector<int>res(q);
for(int i=0;i<q;i++){
int ind=X[i],val=V[i],p=lower_bound(allind.begin(),allind.end(),make_pair(A[ind],ind))-allind.begin();
seg.upd(1,0,kaf-1,p,p,-ind);
seg.upd(1,0,kaf-1,p+1,sz,1);
A[ind]=val;
p=lower_bound(allind.begin(),allind.end(),make_pair(val,ind))-allind.begin();
seg.upd(1,0,kaf-1,p,p,ind);
seg.upd(1,0,kaf-1,p+1,sz,-1);
res[i]=seg.seg[1].maxa>0?seg.seg[1].maxa:0;
}
return res;
}
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