Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
#include<bits/stdc++.h>
#include<cmath>
#include<bitset>
#define ll long long
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define FFOR(i,a,b) for(int i=(a);i<=(b);++i)
#define REP(i,n)  FOR(i,0,n)
#define RREP(i,n)  FFOR(i,0,n)
#define SORT(V) sort((V).begin(),(V).end())
#define INF ((1LL<<62)-(1LL<<31))
#define MOD 1000000007
using namespace std;

int main(){
  ll ans=0,cnt=0,A[10],B[10];
  REP(i,10) A[i]=0;
  
  string S;
  cin>>S;
  ll s=S.size();
  string T[s];
  for(int i=0; i<s; ++S) T.at(i)=S.at(s-i-1);
  
  for(int i=0; i<s; ++i){
    int a=(i+1)%6;
    if(T.at(i)=="?") A[a]+=1;
    else if(a==0) cnt+=(T.at(i)-'0')*4;
    else if(a==5) cnt+=(T.at(i)-'0')*3;
    else if(a==4) cnt-=T.at(i)-'0';
    else if(a==3) cnt-=(T.at(i)-'0')*4;
    else if(a==2) cnt-=(T.at(i)-'0')*3;
    else cnt+=T.at(i)-'0';
  }
  
  cnt%=13;
  
  for(int i=0; i<=A[0]; ++i){
    for(int j=0; j<=A[1]; ++j){
      for(int t=0; t<=A[2]; ++t){
        for(int r=0; r<=A[3]; ++r){
          for(int q=0; q<=A[4]; ++q){
            for(int w=0; w<=A[5]; ++w){
              if((4*A[0]+A[1]-3*A[2]-4*A[3]-A[4]+3*A[5]+cnt)%13==5) ans++;
            }
          }
        }
      }
    }
  }
  
  
  
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:21: error: no match for 'operator++' (operand type is 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   26 |   for(int i=0; i<s; ++S) T.at(i)=S.at(s-i-1);
      |                     ^~~
a.cc:26:28: error: request for member 'at' in 'T', which is of non-class type 'std::string [s]' {aka 'std::__cxx11::basic_string<char> [s]'}
   26 |   for(int i=0; i<s; ++S) T.at(i)=S.at(s-i-1);
      |                            ^~
a.cc:30:10: error: request for member 'at' in 'T', which is of non-class type 'std::string [s]' {aka 'std::__cxx11::basic_string<char> [s]'}
   30 |     if(T.at(i)=="?") A[a]+=1;
      |          ^~
a.cc:31:27: error: request for member 'at' in 'T', which is of non-class type 'std::string [s]' {aka 'std::__cxx11::basic_string<char> [s]'}
   31 |     else if(a==0) cnt+=(T.at(i)-'0')*4;
      |                           ^~
a.cc:32:27: error: request for member 'at' in 'T', which is of non-class type 'std::string [s]' {aka 'std::__cxx11::basic_string<char> [s]'}
   32 |     else if(a==5) cnt+=(T.at(i)-'0')*3;
      |                           ^~
a.cc:33:26: error: request for member 'at' in 'T', which is of non-class type 'std::string [s]' {aka 'std::__cxx11::basic_string<char> [s]'}
   33 |     else if(a==4) cnt-=T.at(i)-'0';
      |                          ^~
a.cc:34:27: error: request for member 'at' in 'T', which is of non-class type 'std::string [s]' {aka 'std::__cxx11::basic_string<char> [s]'}
   34 |     else if(a==3) cnt-=(T.at(i)-'0')*4;
      |                           ^~
a.cc:35:27: error: request for member 'at' in 'T', which is of non-class type 'std::string [s]' {aka 'std::__cxx11::basic_string<char> [s]'}
   35 |     else if(a==2) cnt-=(T.at(i)-'0')*3;
      |                           ^~
a.cc:36:17: error: request for member 'at' in 'T', which is of non-class type 'std::string [s]' {aka 'std::__cxx11::basic_string<char> [s]'}
   36 |     else cnt+=T.at(i)-'0';
      |                 ^~