Language: C++

/*input
3 3
abc


*/
#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<long long, null_type, less<long long>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
#pragma GCC optimize("unroll-loops,no-stack-protector")
//order_of_key #of elements less than x
// find_by_order kth element
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
typedef long long int ll;
#define ld long double
#define pii pair<ll,ll>
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define sz(_a) (ll)(_a.size())
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
const ll maxn=100005;
const ll maxlg=__lg(maxn)+2;
const ll INF64=8000000000000000000LL;
const int INF=0x3f3f3f3f;
const ll MOD=ll(1e9+7);
const ld PI=acos(-1);
const ld eps=1e-9;

ll mypow(ll a,ll b){
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1) res=res*a%MOD;
        a=a*a%MOD;
        b>>=1;
    }
    return res;
}
vector<int> v;
int main() {
	ios_base::sync_with_stdio(0); cin.tie(0);    
	
	int K; cin >> K;
	
	int N = (1 << K);
	
	multiset<int> data;
	
	REP(i, N) {
		int cur; cin >> cur; data.insert(cur*-1);
	}
	
	vi vals;
	vals.pb(*data.begin());
	data.erase(data.begin());
	
	REP(iteration, K) {
		vi newVals;
		REP(i, sz(vals)) {
			if (data.upper_bound(vals[i]) == data.end()) {
				cout << "No" << endl; return 0;
			}
			newVals.pb(*(data.upper_bound(vals[i])));
			data.erase(data.upper_bound(vals[i]));
		}
		
		REP(i, sz(newVals)) {
			vals.pb(newVals[i]);
		}
		sort(all(vals));
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:60:9: error: 'vi' was not declared in this scope; did you mean 'v'?
   60 |         vi vals;
      |         ^~
      |         v
a.cc:61:9: error: 'vals' was not declared in this scope
   61 |         vals.pb(*data.begin());
      |         ^~~~
a.cc:65:19: error: expected ';' before 'newVals'
   65 |                 vi newVals;
      |                   ^~~~~~~~
      |                   ;
a.cc:70:25: error: 'newVals' was not declared in this scope
   70 |                         newVals.pb(*(data.upper_bound(vals[i])));
      |                         ^~~~~~~
a.cc:74:27: error: 'newVals' was not declared in this scope
   74 |                 REP(i, sz(newVals)) {
      |                           ^~~~~~~
a.cc:24:32: note: in definition of macro 'REP'
   24 | #define REP(i,n) for(int i=0;i<n;i++)
      |                                ^
a.cc:74:24: note: in expansion of macro 'sz'
   74 |                 REP(i, sz(newVals)) {
      |                        ^~
a.cc:77:22: error: 'all' was not declared in this scope; did you mean 'std::filesystem::perms::all'?
   77 |                 sort(all(vals));
      |                      ^~~
      |                      std::filesystem::perms::all
In file included from /usr/include/c++/14/filesystem:51,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:200,
                 from a.cc:7:
/usr/include/c++/14/bits/fs_fwd.h:158:7: note: 'std::filesystem::perms::all' declared here
  158 |       all               =  0777,
      |       ^~~