#include "bubblesort2.h"
#include<bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#define pb push_back
#define F first
#define S second
#define all(a) a.begin(),a.end()
#define pii pair <int,int>
#define PII pair<pii , pii>
#define ld long double
#define int long long
#define sz(v) (int)v.size()
#define rep(i , a , b) for(int i=a;i <= (b);i++)
#define per(i , a , b) for(int i=a;i >= (b);i--)
using namespace std ;
const int maxn = 1e6 + 10 , inf= 2e9 , mod = 1e9 + 7 , sq = 360 ;
int MX = 20000 ;
struct fenwick{
int fen[2*MX] ;
void upd(int x ,int w){
x++;
while(x <= MX){
fen[x]+=w;
x+=x&-x;
}
}
int que(int x){
x++;int ans =0 ;
while(x){
ans+=fen[x];
x-=x&-x;
}
return ans ;
}
}f;
std::vector<int> countScans(std::vector<int> A,std::vector<int> X,std::vector<int> V){
int n = sz(A) , q =sz(X) ;
vector <int> res(q) , cm;
rep(i , 0 , n-1)cm.pb(A[i]);
rep(i , 0 ,q-1)cm.pb(V[i]) ;
sort(all(cm)) ;
cm.resize(unique(all(cm))-cm.begin()) ;
rep(i , 0 , n-1){
A[i] = lower_bound(all(cm) , A[i]) -cm.begin() ;
}
rep(i , 0 , q-1){
A[X[i]] = lower_bound(all(cm),V[i])-cm.begin() ;
int ans =0 ;
rep(j , 0 , n-1){
ans = max(ans , j-f.que(A[j])) ;
f.upd(A[j] , 1);
}
rep(i , 0 , sz(cm))f.fen[i]=0;
res[i]=ans;
}
return res;
}
/*
signed main(){
ios::sync_with_stdio(0);cin.tie(0);
int n , q ;
cin >> n >> q;
vector <int> a ;
rep(i , 1, n){
int x;
cin >> x ;
a.pb(x);
}
vector <int> X , V ;
rep(i , 1, q){
int x, v;
cin >> x>> v ;
X.pb(x);V.pb(v);
}
vector <int> ans = countScans(a,X,V) ;
for(int x : ans){
cout << x << "\n" ;
}
return 0;
}
*/
/*
*/
Compilation message
bubblesort2.cpp:19:17: error: array bound is not an integer constant before ']' token
19 | int fen[2*MX] ;
| ^
bubblesort2.cpp: In member function 'void fenwick::upd(long long int, long long int)':
bubblesort2.cpp:23:13: error: 'fen' was not declared in this scope
23 | fen[x]+=w;
| ^~~
bubblesort2.cpp: In member function 'long long int fenwick::que(long long int)':
bubblesort2.cpp:30:18: error: 'fen' was not declared in this scope
30 | ans+=fen[x];
| ^~~
bubblesort2.cpp: In function 'std::vector<long long int> countScans(std::vector<long long int>, std::vector<long long int>, std::vector<long long int>)':
bubblesort2.cpp:54:30: error: 'struct fenwick' has no member named 'fen'
54 | rep(i , 0 , sz(cm))f.fen[i]=0;
| ^~~
