Language: C++

// #define DEBUGGING
#include <bits/stdc++.h>
using namespace std;
#define endl '\n'
#define ALL(V) (V).begin(), (V).end()
#define ALLR(V) (V).rbegin(), (V).rend()

template <typename T> using V = vector<T>;
template <typename T> using VV = V<V<T>>;
using ll = int64_t;
using ull = uint64_t;
using PLL = pair<ll, ll>;

template <typename T> const T& var_min(const T &t) { return t; }
template <typename T> const T& var_max(const T &t) { return t; }
template <typename T, typename... Tail> const T& var_min(const T &t, const Tail&... tail) { return min(t, var_min(tail...)); }
template <typename T, typename... Tail> const T& var_max(const T &t, const Tail&... tail) { return max(t, var_max(tail...)); }
template <typename T, typename... Tail> void chmin(T &t, const Tail&... tail) { t = var_min(t, tail...); }
template <typename T, typename... Tail> void chmax(T &t, const Tail&... tail) { t = var_max(t, tail...); }
template <typename T> const T& clamp(const T &t, const T &low, const T &high) { return max(low, min(high, t)); }
template <typename T> void chclamp(T &t, const T &low, const T &high) { t = clamp(t, low, high); }

namespace init__ {

struct InitIO {
    InitIO() {
        cin.tie(nullptr);
        ios_base::sync_with_stdio(false);
        cout << fixed << setprecision(30);
    }
} init_io;

}

#ifdef DEBUGGING
// #include "../debug/debug.cpp"
#include "../../debug/debug.cpp"
#else
#define DEBUG(...) 0
#define DEBUG_SEPARATOR_LINE 0
#endif

template <typename T>
T make_v(T init) { return init; }

template <typename T, typename... Tail>
auto make_v(T init, size_t s, Tail... tail) {
#define rec make_v(init, tail...)
    return V<decltype(rec)>(s, rec);
#undef rec
}

bool solve() {
    ll N;
    cin >> N;
    map<ll, ll> cnt;
    for(ll i = 0; i < N; i++) {
        ll e;
        cin >> e;
        cnt[e]++;
    }

    if(cnt.size() == 1 && cnt.begin()->first == 0) return true;
    if(N % 3 != 0) return false;
    if(cnt.size() == 2) {
        auto ite0 = cnt.begin();
        auto ite1 = cnt.begin() + 1;
        if(ite0->first == 0 && ite0->second == N / 3) return true;
        if(ite1->first == 0 && ite1->second == N / 3) return true;
        return false;
    }
    if(cnt.size() != 3) return false;
    ll a = N / 3 + (N % 3 >= 1);
    ll b = N / 3 + (N % 3 >= 2);
    ll c = N / 3;
    V<ll> num = { a, b, c, };
    V<ll> idx = { 0, 1, 2, };
    V<ll> clis;
    for(auto &&ele : cnt) clis.push_back(ele.second);
    do {
        auto cpy = clis;
        ll cpy_idx = 0;
        bool ok = true;
        for(ll i = 0; i < 3; i++) {
            ll n = num[idx[i]];
            if(cpy[cpy_idx] < n) {
                ok = false;
                break;
            }
            cpy[cpy_idx] -= n;
            if(!cpy[cpy_idx]) cpy_idx++;
        }
        if(ok) return true;
    } while(next_permutation(ALL(idx)));

    return false;
}

int main() {
    cout << (solve() ? "Yes" : "No") << endl;
    return 0;
}


Compiler output:
a.cc: In function 'bool solve()':
a.cc:67:33: error: no match for 'operator+' (operand types are 'std::map<long int, long int>::iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, long int>, std::_Select1st<std::pair<const long int, long int> >, std::less<long int>, std::allocator<std::pair<const long int, long int> > >::iterator'} and 'int')
   67 |         auto ite1 = cnt.begin() + 1;
      |                     ~~~~~~~~~~~ ^ ~
      |                              |    |
      |                              |    int
      |                              std::map<long int, long int>::iterator {aka std::_Rb_tree<long int, std::pair<const long int, long int>, std::_Select1st<std::pair<const long int, long int> >, std::less<long int>, std::allocator<std::pair<const long int, long int> > >::iterator}
In file included from /usr/include/c++/14/bits/stl_algobase.h:67,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_iterator.h:627:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_Iterator> std::operator+(typename reverse_iterator<_Iterator>::difference_type, const reverse_iterator<_Iterator>&)'
  627 |     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:627:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename move_iterator<_IteratorL>::difference_type, const move_iterator<_IteratorL>&)'
 1798 |     operator+(typename move_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/basic_string.h:3598:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3598 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3598:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   'std::map<long int, long int>::iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, long int>, std::_Select1st<std::pair<const long int, long int> >, std::less<long int>, std::allocator<std::pair<const long int, long int> > >::iterator'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3616:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3616 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   mismatched types 'const _CharT*' and 'std::_Rb_tree_iterator<std::pair<const long int, long int> >'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3635:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3635 |     operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3652:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3652 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   'std::map<long int, long int>::iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, long int>, std::_Select1st<std::pair<const long int, long int> >, std::less<long int>, std::allocator<std::pair<const long int, long int> > >::iterator'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3670:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, _CharT)'
 3670 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   'std::map<long int, long int>::iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, long int>, std::_Select1st<std::pair<const long int, long int> >, std::less<long int>, std::allocator<std::pair<const long int, long int> > >::iterator'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3682:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3682 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   'std::map<long int, long int>::iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, long int>, std::_Select1st<std::pair<const long int, long int> >, std::less<long int>, std::allocator<std::pair<const long int, long int> > >::iterator'} is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3689:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3689 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   'std::map<long int, long int>::iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, long int>, std::_Select1st<std::pair<const long int, long int> >, std::less<long int>, std::allocator<std::pair<const long int, long int> > >::iterator'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3696:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3696 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   'std::map<long int, long int>::iterator' {aka 'std::_Rb_tree<long int, std::pair<const long int, long int>, std::_Select1st<std::pair<const long int, long int> >, std::less<long int>, std::allocator<std::pair<const long int, long int> > >::iterator'} is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3719:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3719 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note:   template argument deduction/substitution failed:
a.cc:67:35: note:   mismatched types 'const _CharT*' and 'std::_Rb_tree_iterator<std::pair<const long int, long int> >'
   67 |         auto ite1 = cnt.begin() + 1;
      |                                   ^
/usr/include/c++/14/bits/basic_string.h:3726:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, __cxx11::basic_string<_CharT, _Tra