#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 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 ,MX = 20000 ;
set <int> s[maxn] ;
vector<int> countScans(vector<int> A, vector<int> X, vector<int> V) {
int n = sz(A) , q = sz(X);
rep(i , 0 , n-1){
s[A[i]].insert(i);
}
vector <int> res ;
rep(i , 0 , q-1){
s[A[X[i]]].erase(X[i]) ;
A[X[i]] = Y[i] ;
s[A[X[i]]].insert(X[i]) ;
int ans = 0 , ted =0 ;
rep(i , 1, 100){
if(sz(s[i])){
ans = max(ans , (*s[i].rbegin()) - ted) ;
}
ted += sz(s[i]) ;
}
res.pb(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 >>v>> x ;
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: In function 'std::vector<int> countScans(std::vector<int>, std::vector<int>, std::vector<int>)':
bubblesort2.cpp:24:19: error: 'Y' was not declared in this scope
24 | A[X[i]] = Y[i] ;
| ^
