Language: C++

#include <bits/stdc++.h>
#define itn int
#define REP(i, n) for (int i = 0; i < n; i++)
#define IREP(i, n) for (int i = n - 1; i >= 0; i--)
#define FOR(a, b) for (int i = a; i < b + 1; i++)
#define MOD 1000000007
using namespace std;
typedef long long ll;

int main(){
  string s;
  cin >> s;
  string t;
  cin >> t;
  vector<int> v;
  if(s.size()<t.size()){
    cout << "UNRESTORABLE" << endl;
    return 0;
  }
  REP(i,s.size()-t.size()+1){
    bool flag=true;
    for(int j=0;j<t.size();j++){
      if(s[j+i]==t[j]){
        continue;
      }
      else if(s[j+i]=='?'){
        continue;
      }
      else{
        flag=false;
      }
    }
    if(flag){
      v.insert(i);
    }
  }
  if(v.empty){
    cout << "UNRESTORABLE" << endl;
    return 0;
  }
  sort(v.begin(),v.end(),greater<int>());
  int tmp=v[0];
  REP(i,s.size()){
    if(s[i]=='?'){
      if(i>=tmp&&i<tmp+t.size()){
        s[i]=t[i-tmp];
      }
      else{
        s[i]='a';
      }
    }
  }
  cout << s << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:15: error: no matching function for call to 'std::vector<int>::insert(int&)'
   34 |       v.insert(i);
      |       ~~~~~~~~^~~
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h:1484:9: note: candidate: 'template<class _InputIterator, class> std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(const_iterator, _InputIterator, _InputIterator) [with <template-parameter-2-2> = _InputIterator; _Tp = int; _Alloc = std::allocator<int>]'
 1484 |         insert(const_iterator __position, _InputIterator __first,
      |         ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:1484:9: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/vector:72:
/usr/include/c++/14/bits/vector.tcc:133:5: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(const_iterator, const value_type&) [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator; const_iterator = std::vector<int>::const_iterator; value_type = int]'
  133 |     vector<_Tp, _Alloc>::
      |     ^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/vector.tcc:133:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:1395:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(const_iterator, value_type&&) [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator; const_iterator = std::vector<int>::const_iterator; value_type = int]'
 1395 |       insert(const_iterator __position, value_type&& __x)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:1395:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:1413:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(const_iterator, std::initializer_list<_Tp>) [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator; const_iterator = std::vector<int>::const_iterator]'
 1413 |       insert(const_iterator __position, initializer_list<value_type> __l)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:1413:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:1439:7: note: candidate: 'std::vector<_Tp, _Alloc>::iterator std::vector<_Tp, _Alloc>::insert(const_iterator, size_type, const value_type&) [with _Tp = int; _Alloc = std::allocator<int>; iterator = std::vector<int>::iterator; const_iterator = std::vector<int>::const_iterator; size_type = long unsigned int; value_type = int]'
 1439 |       insert(const_iterator __position, size_type __n, const value_type& __x)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:1439:7: note:   candidate expects 3 arguments, 1 provided
a.cc:37:13: error: cannot convert 'std::vector<int>::empty' from type 'bool (std::vector<int>::)() const noexcept' to type 'bool'
   37 |   if(v.empty){
      |             ^