Language: C++

#include <bits/stdc++.h>
using namespace std;

const int MAX = 1e6 + 10; 
const int OO = 0x3f3f3f3f;
const double EPS = 1e-6; 
const long long MOD = 1000000000;

#define bug(x) cerr << #x << " = " << x << '\n'
#define _ << " , " <<
#define FOR(i, a, n) for(int i = a; i < n; i++)
#define REP(i, n) FOR(i, 0, n)
#define fi first
#define se second
#define pb push_back
#define mt make_tuple
#define all(vetor) vetor.begin(), vetor.end()
#define X real()
#define Y imag()
#define sc(a) scanf(" %d", &a)
//#define gc getchar_unlocked

typedef long long ll;
typedef long double ld;
typedef pair<ll, ll> ii;
typedef pair<int, ii> iii;
typedef complex<ll> Pll;
typedef complex<ld> Pld;

bool cmp(ii a, ii b)
{
    return a.fi + a.se > b.fi + b.se;
}

map<int, map<int, int>> DP;
vector<ii> arr;

int solve(int id, int R)
{
    if(R < 0) return -1;
    if(id == arr.size()) return 0;
    if(DP[id].find(R) != DP[id].end())
        return DP[id][R];
    return DP[id][R] = max(solve(id + 1, min(R - arr[id].fi, arr[id].se)) + 1, solve(id + 1, R));
}

int32_t main()
{
    int n;
    
    sc(n);
    REP(i, n)
    {
        int p, r;
        sc(r); sc(p);
        arr.pb({p, r});
    }
    
    sort(all(arr), cmp);
       
    cout << max(solve(0, OO), 0LL) << '\n';
       
	return 0;
}

Compiler output:
a.cc: In function 'int32_t main()':
a.cc:61:16: error: no matching function for call to 'max(int, long long int)'
   61 |     cout << max(solve(0, OO), 0LL) << '\n';
      |             ~~~^~~~~~~~~~~~~~~~~~~
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:61:16: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   61 |     cout << max(solve(0, OO), 0LL) << '\n';
      |             ~~~^~~~~~~~~~~~~~~~~~~
/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:61:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   61 |     cout << max(solve(0, OO), 0LL) << '\n';
      |             ~~~^~~~~~~~~~~~~~~~~~~