Language: C++

#include<iostream>
#include<string>
#include<cmath>
#include<queue>
#include<map>
#include<set>
#include<list>
#include<iomanip>
#include<vector>
#include<functional>
#include<algorithm>
#include<cstdio>
using namespace std;
typedef long long ll;
int dp[3001][3001];
ll n, t, s;
struct A {
	ll a, b;
};
A a[3000];
ll solve(ll i, ll j) {
	if (i == n) return 0;
	ll sum = 0;
	if (j + a[i].b <= t) {
		if (j<s&&j + a[i].b>s&&s+a[i].b<=t) {
			if (dp[i + 1][s + a[i].b] != -1) {
				sum = max(sum, a[i].a + dp[i + 1][s + a[i].b]);
			}
			else {
				sum = max(sum, a[i].a +
					(dp[i + 1][s + a[i].b] = solve(i + 1, s + a[i].b)));
			}
		}
		else if (!(j<s&&j + a[i].b>s)){
			if (dp[i + 1][j + a[i].b] != -1) {
				sum = max(sum, a[i].a + dp[i + 1][j + a[i].b]);
			}
			else {
				sum = max(sum, a[i].a +
					(dp[i + 1][j + a[i].b] = solve(i + 1, j + a[i].b)));
			}
		}
	}//??????
	if (dp[i + 1][j] != -1) {
		sum = max(sum, dp[i + 1][j]);
	}
	else {
		sum = max(sum, dp[i + 1][j] = solve(i + 1, j));
	}//????????????
	return sum;
}
int main() {
	while (cin >> n >> t >> s) {
		for (ll i = 0; i < n; i++) {
			cin >> a[i].a >> a[i].b;
			for (ll j = 0; j <= t; j++) {
				dp[i][j] = -1;
			}
		}
		cout << solve(0, 0) << endl;
	}
}

Compiler output:
a.cc: In function 'll solve(ll, ll)':
a.cc:45:26: error: no matching function for call to 'max(ll&, int&)'
   45 |                 sum = max(sum, dp[i + 1][j]);
      |                       ~~~^~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 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:45:26: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   45 |                 sum = max(sum, dp[i + 1][j]);
      |                       ~~~^~~~~~~~~~~~~~~~~~~
/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,
                 from a.cc:11:
/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:45:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   45 |                 sum = max(sum, dp[i + 1][j]);
      |                       ~~~^~~~~~~~~~~~~~~~~~~
a.cc:48:26: error: no matching function for call to 'max(ll&, int&)'
   48 |                 sum = max(sum, dp[i + 1][j] = solve(i + 1, j));
      |                       ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:48:26: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   48 |                 sum = max(sum, dp[i + 1][j] = solve(i + 1, j));
      |                       ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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
/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:48:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   48 |                 sum = max(sum, dp[i + 1][j] = solve(i + 1, j));
      |                       ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~