Language: C++

//#include <bits/stdc++.h>
#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <set>
#include <queue>
#include <cmath>
#include <map>

using namespace std;
int main(){
    int n,m;
    cin >> n >> m;
    vector<int> s(n),t();
    for(int i=0;i<n;i++){
        cin >> s[i];
    }
    for (int i=0;i<m;i++){
        cin >> t[i];
    }
    vector<vector<long long>> dp(n+1,vector<long long> (m+1,0));
    for(int i=0;i<n+1;i++){
        dp[i][0]=1;
    }
    for(int i=0;i<m+1;i++){
        dp[0][i]=1;
    }
    for (int i=0;i<n;i++){
        for(int j=0;j<m;j++){
            if(s[i]==t[j]){
                dp[i+1][j+1]=(dp[i][j+1]+dp[i+1][j])%1000000007;;
            }
            else{
                dp[i+1][j+1]=(dp[i][j+1]+dp[i+1][j]-dp[i][j]+1000000007)%1000000007;
            }
        }
    }
    cout << dp[n][m] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:15:23: warning: empty parentheses were disambiguated as a function declaration [-Wvexing-parse]
   15 |     vector<int> s(n),t();
      |                       ^~
a.cc:15:23: note: remove parentheses to default-initialize a variable
   15 |     vector<int> s(n),t();
      |                       ^~
      |                       --
a.cc:20:19: warning: pointer to a function used in arithmetic [-Wpointer-arith]
   20 |         cin >> t[i];
      |                   ^
a.cc:20:13: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'std::vector<int>()')
   20 |         cin >> t[i];
      |         ~~~ ^~ ~~~~
      |         |         |
      |         |         std::vector<int>()
      |         std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/iostream:42,
                 from a.cc:2:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'std::vector<int> (*)()'
   20 |         cin >> t[i];
      |                ~~~^
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'short int' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(short int)(t + ((sizetype)i))' to 'short int&'
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'short unsigned int' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(short unsigned int)(t + ((sizetype)i))' to 'short unsigned int&'
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'int' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(int)(t + ((sizetype)i))' to 'int&'
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'unsigned int' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(unsigned int)(t + ((sizetype)i))' to 'unsigned int&'
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'long int' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(long int)(t + ((sizetype)i))' to 'long int&'
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'long unsigned int' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(long unsigned int)(t + ((sizetype)i))' to 'long unsigned int&'
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'long long int' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(long long int)(t + ((sizetype)i))' to 'long long int&'
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'long long unsigned int' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(long long unsigned int)(t + ((sizetype)i))' to 'long long unsigned int&'
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'void*' [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
a.cc:20:19: error: cannot bind rvalue '(void*)(t + ((sizetype)i))' to 'void*&'
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
/usr/include/c++/14/istream:126:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__ios_type& (*)(__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>; __ios_type = std::basic_ios<char>]' (near match)
  126 |       operator>>(__ios_type& (*__pf)(__ios_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:126:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:19: error: invalid conversion from 'std::vector<int> (*)()' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'} [-fpermissive]
   20 |         cin >> t[i];
      |                ~~~^
      |                   |
      |                   std::vector<int> (*)()
/usr/include/c++/14/istream:133:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(std::ios_base& (*)(std::ios_base&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = st