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;
#ifdef LOCAL
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {
cerr<<vars<<" = ";
string delim="";
(...,(cerr<<delim<<values,delim=", "));
cerr<<"\n";
}
#else
#define deb(...) logger(#__VA_ARGS__, __VA_ARGS__)
template<typename ...Args>
void logger(string vars, Args&&... values) {}
#endif
#define pb push_back
#define sz(x) (int)(x.size())
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
template<typename T> inline void maxa(T& a,T b){a=max(a,b);}
template<typename T> inline void mina(T& a,T b){a=min(a,b);}
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const int mxN=1e6+5; //make sure this is right
const int mod=1e9+7;
int st[4*mxN];
int a[mxN],lazy[4*mxN];
vector<pii> all;
int get(pii x){
return lower_bound(all.begin(),all.end(),x)-all.begin()+1;
}
void push(int v){
lazy[v<<1]+=lazy[v];
lazy[v<<1|1]+=lazy[v];
st[v<<1]+=lazy[v];
st[v<<1|1]+=lazy[v];
lazy[v]=0;
}
void point_upd(int v,int l,int r,int ind,int val){
if(ind<l || ind>r)
return;
if(l==r){
st[v]=val;
} else{
int m=(l+r)>>1;
push(v);
point_upd(v<<1,l,m,ind,val);
point_upd(v<<1|1,m+1,r,ind,val);
st[v]=max(st[v<<1],st[v<<1|1]);
}
}
void range_upd(int v,int l,int r,int lq,int rq,int val){
if(lq>rq)
return;
if(l>=lq && r<=rq){
st[v]+=val;
lazy[v]+=val;
} else{
int m=(l+r)>>1;
push(v);
range_upd(v<<1,l,m,lq,min(m,rq),val);
range_upd(v<<1|1,m+1,r,max(lq,m+1),rq,val);
st[v]=max(st[v<<1],st[v<<1|1]);
}
}
struct BIT{
ll bit[mxN];
void upd(int x,int v){while(x<mxN){bit[x]+=v;x+=x&-x;}}
ll sum(int x){ll res=0;while(x){res+=bit[x];x-=x&-x;}return res;}
};
BIT bit;
vector<int> countScans(vector<int> A,vector<int> X,vector<int> V){
int n=sz(A); int q=sz(X);
for(int i=0;i<n;i++){
all.pb({A[i],i});
}
for(int i=0;i<q;i++){
all.pb({V[i],X[i]});
}
sort(all.begin(),all.end());
all.resize(unique(all.begin(),all.end())-all.begin());
vector<int> ans;
for(int i=0;i<n;i++){
A[i]=get({A[i],i});
bit.upd(A[i],1);
}
for(int i=0;i<n;i++){
int sm=bit.sum(A[i]);
int move=sm-i-1;
point_upd(1,1,2*n,A[i],move);
}
for(int i=0;i<q;i++){
int f=A[X[i]];
int s=get({V[i],X[i]});
bit.upd(f,-1);
bit.upd(s,1);
int sm=bit.sum(s);
int move=sm-X[i]-1;
if(f<s)
range_upd(1,1,2*n,f+1,s-1,-1);
else{
range_upd(1,1,2*n,s+1,f-1,1);
}
point_upd(1,1,2*n,f,0);
point_upd(1,1,2*n,s,move);
ans.pb(max(0,st[1]));
A[X[i]]=s;
}
return ans;
}
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