#include<bits/stdc++.h>
#define pb push_back
#define left 2*i+1
#define righ 2*i+2
#define mid (l+r)/2
using namespace std;
const int maxn=1e6+100;
vector<int>a,pos,val,ans;
int cnt=0;
map<int,int>ha;
set<int>id[maxn];
int st[4*maxn],lazy[4*maxn];
void upd(int i,int l,int r,int ql,int qr,int del){
if(lazy[i]){
st[i]+=lazy[i];
if(l!=r){
lazy[left]+=lazy[i];
lazy[righ]+=lazy[i];
}
lazy[i]=0;
}
if(r<ql||l>qr)return;
if(l>=ql&&r<=qr){
st[i]+=del;
if(l!=r){
lazy[left]+=del;
lazy[righ]+=del;
}
return;
}
upd(left,l,mid,ql,qr,del);
upd(righ,mid+1,r,ql,qr,del);
st[i]=max(st[left],st[righ]);
}
void rem(int i,int x){
upd(0,0,cnt-1,x,cnt-1,1);
if(i==*id[x].rbegin()){
auto it=id[x].end();
it--;
int del=-*it;
it--;
del+=*it;
upd(0,0,cnt-1,x,x,del);
}
id[x].erase(i);
}
void add(int i,int x){
upd(0,0,cnt-1,x,cnt-1,-1);
if(i>*id[x].rbegin()){
upd(0,0,cnt-1,x,x,i-*id[x].rbegin());
}
id[x].insert(i);
a[i]=x;
}
void solve(){
for(auto x:a)ha[x]=1;
for(auto x:val)ha[x]=1;
for(auto &x:ha){
x.second=cnt++;
}
for(int i=0;i<cnt;i++){
id[i].insert(-maxn);
}
for(int i=0;i<a.size();i++){
a[i]=ha[a[i]];
id[a[i]].insert(i);
upd(0,0,cnt-1,a[i],cnt-1,-1);
}
for(int i=0;i<cnt;i++){
upd(0,0,cnt-1,i,i,*id[i].rbegin());
}
for(int q=0;q<pos.size();q++){
rem(pos[q],a[pos[q]]);
add(pos[q],ha[val[q]]);
ans.pb(st[0]+1);
}
}
Compilation message
bubblesort2.cpp: In function 'void solve()':
bubblesort2.cpp:68:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
68 | for(int i=0;i<a.size();i++){
| ~^~~~~~~~~
bubblesort2.cpp:76:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
76 | for(int q=0;q<pos.size();q++){
| ~^~~~~~~~~~~
/usr/bin/ld: /tmp/ccahbHro.o: in function `main':
grader.cpp:(.text.startup+0x19f): undefined reference to `countScans(std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >, std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status
