anyone pls help me out …
what i am doing a mistake in this code
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
using namespace std;
#define umii unordered_map<int,int >
#define umic unordered_map<int,char >
#define umci unordered_map<char,int >
#define usi unordered_set<int>
#define usc unordered_set<char>
#define mii map<int,int >
#define mic map<int,char >
#define mci map<char,int >
#define si set<int>
#define sc set<char>
#define ll long long
#define ff first
#define ss second
#define pb push_back
#define mp make_pair
#define pii pair<int,int>
#define vii vector<vector<int>>
#define vi vector<int>
#define pqb priority_queue<int>
#define pqs priority_queue<int,vi,greater<int>>
#define setbits(x) __builtin_popcountll(x)
#define zrobits(x) __builtin_ctzll(x)
#define mod 1000000007
#define inf 1e18
#define ps(x,y) fixed<<setprecision(y)<<x
#define mk(arr,n,type) type *arr=new type[n];
#define w(x) int x; cin>>x; while(x--)
void c_p_c()
{
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif
}
int main()
{
w(x)
{
int n ;
cin >> n ;
int arr[n];
for (int i = 0 ; i < n ; i++)
cin >> arr[i];
multiset<int> ms ;
ms.insert(arr[0]);
for (int i = 1 ; i < n ; i++ )
{
auto it = ms.upper_bound(arr[i]);
if (*it < arr[i] )
{
ms.insert(arr[i]);
}
else
{
if (*it == arr[i - 1])
{
it++;
if (it == ms.end())
{
ms.insert(arr[i]);
}
else
{
ms.erase(it);
ms.insert(arr[i]);
}
}
else
{
ms.erase(it);
ms.insert(arr[i]);
}
}
}
cout<<ms.size()<<" " ;
for (auto x : ms )
cout << x << " " ;
cout << endl ;
}
return 0;
}