#include "bubblesort2.h"
#include <bits/stdc++.h>
#define rep(i,a,b) for(int i=(a);i<=(b);++i)
#define per(i,a,b) for(int i=(a);i>=(b);--i)
#define pii pair<int,int>
#define vi vector<int>
#define fi first
#define se second
#define pb push_back
#define ALL(x) x.begin(),x.end()
#define ll long long
using namespace std;
inline ll read(){
    ll x=0,f=1;char ch=getchar();
    while (!isdigit(ch)){if (ch=='-') f=-1;ch=getchar();}
    while (isdigit(ch)){x=x*10+ch-48;ch=getchar();}
    return x*f;
}
const int inf=INT_MAX/2;
int s;
vi mx,lz;
void init(int n){
    s=1;
    while(s<n)s*=2;
    mx.resize(2*s,0),lz.resize(2*s,0);
}
#define ls (p<<1)
#define rs (p<<1|1)
void pushdown(int p){
    if(!lz[p])return;
    mx[p]+=lz[p],lz[ls]+=lz[p],lz[rs]+=lz[p];
    lz[p]=0;
}
int Q(int p){return mx[p]+lz[p];}
void Add(int p,int L,int R,int l,int r,int v){
    if(r<=L||R<=l)return;
    if(l<=L&&R<=r){
        lz[p]+=v;
        return;
    }
    pushdown(p);
    int mid=(L+R)>>1;
    Add(ls,L,mid,l,r,v);
    Add(rs,mid,R,l,r,v);
    mx[p]=max(Q(ls),Q(rs));
}
void Add(int l,int r,int v){
    if(l<r)Add(1,0,s,l,r,v);
}
vi countScans(vi a,vi x,vi v){
    int n=a.size(),q=x.size();
    vector<pii> lsh;
    rep(i,0,n-1)lsh.pb(pii(a[i],i));
    rep(i,0,q-1)lsh.pb(pii(v[i],x[i]));
    sort(ALL(lsh));
    lsh.erase(unique(ALL(lsh)),lsh.end());
    int s=lsh.size();
    init(s);
    Add(0,s,-inf);
    const auto insert = [&](int p,int r){
        int i=lower_bound(ALL(lsh),pii(p,r))-lsh.begin();
        Add(i,i+1,inf+r);Add(i+1,s,-1);
    };
    const auto erase = [&](int p,int r){
        int i=lower_bound(ALL(lsh),pii(p,r))-lsh.begin();
        Add(i,i+1,-(inf+r));Add(i+1,s,1);
    };
    rep(i,0,n-1)insert(a[i],i);
    vi res(q);
    rep(i,0,q-1){
        erase(a[x[i]],x[i]);
        insert(v[i],x[i]);
        a[x[i]]=v[i];res[i]=Q(1);
    }
    return res;
}

/usr/bin/ld: /usr/lib/gcc/x86_64-linux-gnu/13/../../../x86_64-linux-gnu/Scrt1.o: in function `_start':
(.text+0x24): undefined reference to `main'
collect2: error: ld returned 1 exit status