Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for (int i = 0; i <(n); ++i)
#define ALL(v) v.begin(), v.end()
using namespace std;
using ll = long long;
using P = pair<int,int>;

static const int INF = 1001001001;
vector<int> to[100005];

int main(){
  int n, m;
  cin >> n >> m;
  REP(i,m){
    int a, b;
    cin >> a >> b;
    --a; --b; //始点を０からにするため
    //ノードにつながる他のノードを配列に格納
    to[a].push_back(b);
    to[b].push_back(a);
  }


  //BFS
  queue<int> q;
  vector<int> dist(n, INF); //すべての要素にINFを代入して初期化
  vector<int> pre(n, -1); //直前の頂点
  //始点の０をキューに入れる
  q.push(0);
  while(q.empty()){
    //キューの先頭から取り出し
    int v = q.front();
    q.pop();
    //vを訪れる
    for(int u : to[v]){
      if(dist != INF) continue; //既に訪れていたら何もしない
      dist[u] = dist[v] + 1;
      pre[u] = v;
      q.push(u);
    }
  }

  cout << "Yes" << endl;
  REP(i,n){
    if(i == 0) continue;
    int ans = pre[i];
    ++ans; //始点を１に戻す
    cout << ans << endl;
  }

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:15: error: no match for 'operator!=' (operand types are 'std::vector<int>' and 'const int')
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |          ~~~~ ^~ ~~~
      |          |       |
      |          |       const int
      |          std::vector<int>
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181,
                 from a.cc:1:
/usr/include/c++/14/bits/regex.h:1132:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator!=(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1132 |     operator!=(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1132:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/regex.h:1212:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const sub_match<_BiIter>&)'
 1212 |     operator!=(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1212:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'std::__cxx11::__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/regex.h:1305:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator!=(const sub_match<_BiIter>&, __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1305 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1305:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/regex.h:1379:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1379 |     operator!=(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1379:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const int'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/regex.h:1473:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1473 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1473:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/regex.h:1547:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1547 |     operator!=(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1547:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'const int'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/regex.h:1647:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator!=(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1647 |     operator!=(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1647:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/regex.h:2213:5: note: candidate: 'template<class _Bi_iter, class _Alloc> bool std::__cxx11::operator!=(const match_results<_BiIter, _Alloc>&, const match_results<_BiIter, _Alloc>&)'
 2213 |     operator!=(const match_results<_Bi_iter, _Alloc>& __m1,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:2213:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::__cxx11::match_results<_BiIter, _Alloc>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51:
/usr/include/c++/14/bits/stl_pair.h:1052:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator!=(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1052 |     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1052:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::pair<_T1, _T2>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/usr/include/c++/14/bits/stl_iterator.h:455:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  455 |     operator!=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:455:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/stl_iterator.h:500:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  500 |     operator!=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:500:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::reverse_iterator<_Iterator>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1686 |     operator!=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::move_iterator<_IteratorL>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1753 |     operator!=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::move_iterator<_IteratorL>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
In file included from /usr/include/c++/14/bits/char_traits.h:42,
                 from /usr/include/c++/14/string:42,
                 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/postypes.h:197:5: note: candidate: 'template<class _StateT> bool std::operator!=(const fpos<_StateT>&, const fpos<_StateT>&)'
  197 |     operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:197:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::fpos<_StateT>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
In file included from /usr/include/c++/14/string:43:
/usr/include/c++/14/bits/allocator.h:243:5: note: candidate: 'template<class _T1, class _T2> bool std::operator!=(const allocator<_CharT>&, const allocator<_T2>&)'
  243 |     operator!=(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:243:5: note:   template argument deduction/substitution failed:
a.cc:36:18: note:   'std::vector<int>' is not derived from 'const std::allocator<_CharT>'
   36 |       if(dist != INF) continue; //既に訪れていたら何もしない
      |                  ^~~
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/usr/include/c++/14/string_view:651:5: note: candidate: 'template<class _CharT, class _Traits> co