Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <deque>
#include <queue>
#include <set>
#include <map>
#include <limits>
#include <cmath>
#include <iomanip>
#include <functional>
#include <random>
#include <set>
using namespace std;
using ll = long long;

ll BASE_NUM = 1000000007;

template< int mod >
struct ModInt {
  int x;

  ModInt() : x(0) {}

  ModInt(int64_t y) : x(y >= 0 ? y % mod : (mod - (-y) % mod) % mod) {}

  ModInt &operator+=(const ModInt &p) {
    if((x += p.x) >= mod) x -= mod;
    return *this;
  }

  ModInt &operator-=(const ModInt &p) {
    if((x += mod - p.x) >= mod) x -= mod;
    return *this;
  }

  ModInt &operator*=(const ModInt &p) {
    x = (int) (1LL * x * p.x % mod);
    return *this;
  }

  ModInt &operator/=(const ModInt &p) {
    *this *= p.inverse();
    return *this;
  }

  ModInt operator-() const { return ModInt(-x); }

  ModInt operator+(const ModInt &p) const { return ModInt(*this) += p; }

  ModInt operator-(const ModInt &p) const { return ModInt(*this) -= p; }

  ModInt operator*(const ModInt &p) const { return ModInt(*this) *= p; }

  ModInt operator/(const ModInt &p) const { return ModInt(*this) /= p; }

  bool operator==(const ModInt &p) const { return x == p.x; }

  bool operator!=(const ModInt &p) const { return x != p.x; }

  ModInt inverse() const {
    int a = x, b = mod, u = 1, v = 0, t;
    while(b > 0) {
      t = a / b;
      swap(a -= t * b, b);
      swap(u -= t * v, v);
    }
    return ModInt(u);
  }

  ModInt pow(int64_t n) const {
    ModInt ret(1), mul(x);
    while(n > 0) {
      if(n & 1) ret *= mul;
      mul *= mul;
      n >>= 1;
    }
    return ret;
  }

  friend ostream &operator<<(ostream &os, const ModInt &p) {
    return os << p.x;
  }

  friend istream &operator>>(istream &is, ModInt &a) {
    int64_t t;
    is >> t;
    a = ModInt< mod >(t);
    return (is);
  }

  static int get_mod() { return mod; }
};

using modint = ModInt< 998244353 >;


int main()
{
    // 整数の入力
    ll N,S;
    cin >> N >> S;
    vector<ll> A(N);
    for(int i = 0;i < N;i++){
        cin >> A[i];
    }
    vector<vector<vector<modint>>> forwardDP(N+1,vector<vector<ll>>(N+1,vector<ll>(S+1,0)));
    forwardDP[0][0][0] = 1;
    for(int i = 0;i < N;i++){
        for(int k = 0;k <= N;k++){
            for(int j = 0; j <= S;j++){
                if (j >= A[i] && k < N){
                    forwardDP[i+1][k+1][j] += forwardDP[i][k][j- A[i]];
                }
                forwardDP[i+1][k][j] += forwardDP[i][k][j];
            }
        }
    }
    modint ans = 0;
    modint two = 2;
    for(int i = 0; i <= N;i++){
        modint a = forwardDP[N][i][S];
        ans += a * two.pow(N-i);
    }
    cout << ans << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:107:91: error: no matching function for call to 'std::vector<std::vector<std::vector<ModInt<998244353> > > >::vector(ll, std::vector<std::vector<long long int> >)'
  107 |     vector<vector<vector<modint>>> forwardDP(N+1,vector<vector<ll>>(N+1,vector<ll>(S+1,0)));
      |                                                                                           ^
In file included from /usr/include/c++/14/vector:66,
                 from a.cc:3:
/usr/include/c++/14/bits/stl_vector.h:707:9: note: candidate: 'template<class _InputIterator, class> std::vector<_Tp, _Alloc>::vector(_InputIterator, _InputIterator, const allocator_type&) [with <template-parameter-2-2> = _InputIterator; _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  707 |         vector(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:707:9: note:   template argument deduction/substitution failed:
a.cc:107:91: note:   deduced conflicting types for parameter '_InputIterator' ('long long int' and 'std::vector<std::vector<long long int> >')
  107 |     vector<vector<vector<modint>>> forwardDP(N+1,vector<vector<ll>>(N+1,vector<ll>(S+1,0)));
      |                                                                                           ^
/usr/include/c++/14/bits/stl_vector.h:678:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::initializer_list<_Tp>, const allocator_type&) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; allocator_type = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  678 |       vector(initializer_list<value_type> __l,
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:678:43: note:   no known conversion for argument 1 from 'll' {aka 'long long int'} to 'std::initializer_list<std::vector<std::vector<ModInt<998244353> > > >'
  678 |       vector(initializer_list<value_type> __l,
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:659:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, std::__type_identity_t<_Alloc>&) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; std::__type_identity_t<_Alloc> = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  659 |       vector(vector&& __rv, const __type_identity_t<allocator_type>& __m)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:659:23: note:   no known conversion for argument 1 from 'll' {aka 'long long int'} to 'std::vector<std::vector<std::vector<ModInt<998244353> > > >&&'
  659 |       vector(vector&& __rv, const __type_identity_t<allocator_type>& __m)
      |              ~~~~~~~~~^~~~
/usr/include/c++/14/bits/stl_vector.h:640:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, const allocator_type&, std::false_type) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; allocator_type = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; std::false_type = std::false_type]'
  640 |       vector(vector&& __rv, const allocator_type& __m, false_type)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:640:7: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_vector.h:635:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, const allocator_type&, std::true_type) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; allocator_type = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; std::true_type = std::true_type]'
  635 |       vector(vector&& __rv, const allocator_type& __m, true_type) noexcept
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:635:7: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_vector.h:624:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&, std::__type_identity_t<_Alloc>&) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; std::__type_identity_t<_Alloc> = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  624 |       vector(const vector& __x, const __type_identity_t<allocator_type>& __a)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:624:28: note:   no known conversion for argument 1 from 'll' {aka 'long long int'} to 'const std::vector<std::vector<std::vector<ModInt<998244353> > > >&'
  624 |       vector(const vector& __x, const __type_identity_t<allocator_type>& __a)
      |              ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:620:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  620 |       vector(vector&&) noexcept = default;
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:620:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_vector.h:601:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  601 |       vector(const vector& __x)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:601:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_vector.h:569:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(size_type, const value_type&, const allocator_type&) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; size_type = long unsigned int; value_type = std::vector<std::vector<ModInt<998244353> > >; allocator_type = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  569 |       vector(size_type __n, const value_type& __value,
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:569:47: note:   no known conversion for argument 2 from 'std::vector<std::vector<long long int> >' to 'const std::vector<std::vector<std::vector<ModInt<998244353> > > >::value_type&' {aka 'const std::vector<std::vector<ModInt<998244353> > >&'}
  569 |       vector(size_type __n, const value_type& __value,
      |                             ~~~~~~~~~~~~~~~~~~^~~~~~~
/usr/include/c++/14/bits/stl_vector.h:556:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(size_type, const allocator_type&) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; size_type = long unsigned int; allocator_type = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  556 |       vector(size_type __n, const allocator_type& __a = allocator_type())
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:556:51: note:   no known conversion for argument 2 from 'std::vector<std::vector<long long int> >' to 'const std::vector<std::vector<std::vector<ModInt<998244353> > > >::allocator_type&' {aka 'const std::allocator<std::vector<std::vector<ModInt<998244353> > > >&'}
  556 |       vector(size_type __n, const allocator_type& __a = allocator_type())
      |                             ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:542:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const allocator_type&) [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >; allocator_type = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  542 |       vector(const allocator_type& __a) _GLIBCXX_NOEXCEPT
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:542:7: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_vector.h:531:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector() [with _Tp = std::vector<std::vector<ModInt<998244353> > >; _Alloc = std::allocator<std::vector<std::vector<ModInt<998244353> > > >]'
  531 |       vector() = default;
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:531:7: note:   candidate expects 0 arguments, 2 provided