Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef int64_t ll;
using P   = pair<ll, ll>;
using mat = vector<vector<ll>>;

void IOS() { ios::sync_with_stdio(false), cin.tie(0); }

template <typename A, size_t N, typename T>
void Fill(A (&array)[N], const T &val) {
    fill((T *)array, (T *)(array + N), val);
}

const ll INF = 1e16;
const ll MOD = 1e9 + 7;
// int dx[4]    = {1, 0, -1, 0};
// int dy[4]    = {0, 1, 0, -1};
// ll pas[5001][5002];

ll dp[102][114514]  = {};
ll sum[102][114514] = {};

signed main() {
    IOS();
    ll n, k;
    cin >> n >> k;
    vector<ll> a(n);
    for (int i = 0; i < n; ++i) { cin >> a[i]; }
    sum[0][0] = 0;
    for (int i = 0; i <= k; ++i) {
        dp[0][i]      = (i <= a[0] ? 1 : 0);
        sum[0][i + 1] = sum[0][i] + dp[0][i];
    }
    for (int i = 1; i < n; ++i) {
        for (int j = 0; j <= k; ++j) {
            dp[i][j] =
                (sum[i - 1][j + 1] - sum[i - 1][max(0ll, j - a[i])]) % MOD;
            sum[i][j + 1] = (dp[i][j] + sum[i][j]) % MOD;
        }
    }
    cout << dp[n - 1][k] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:52: error: no matching function for call to 'max(long long int, __gnu_cxx::__alloc_traits<std::allocator<long int>, long int>::value_type)'
   37 |                 (sum[i - 1][j + 1] - sum[i - 1][max(0ll, j - a[i])]) % MOD;
      |                                                 ~~~^~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:37:52: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and '__gnu_cxx::__alloc_traits<std::allocator<long int>, long int>::value_type' {aka 'long int'})
   37 |                 (sum[i - 1][j + 1] - sum[i - 1][max(0ll, j - a[i])]) % MOD;
      |                                                 ~~~^~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:37:52: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   37 |                 (sum[i - 1][j + 1] - sum[i - 1][max(0ll, j - a[i])]) % MOD;
      |                                                 ~~~^~~~~~~~~~~~~~~