Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <utility>
#include <cstdlib>
#include <cmath>
#include <functional>

#define INF 1000000000000000000
using namespace std;
typedef long long ll;

int n;
ll k;
ll a[5010];
bool dp[5010];

bool need(int m) {
	for (int i = 1; i < k; i++) {
		dp[i] = false;
	}
	dp[0] = true;
	for (int i = 0; i < n; i++) {
		if (i == m)continue;
		for (int j = k - 1; j >= 0; j--) {
			if (dp[j] && (j + a[i]) < k) {
				dp[j + a[i]] = true;
			}
		}
	}
	for (int i = max(0, k - a[m]); i < k; i++) {
		if (dp[i])return true;
	}
	return false;
}


int main(){
	cin >> n>>k;
	int lo, hi;
	lo = 0; hi = n - 1;

	for (int i = 0; i < n; i++) {
		cin >> a[i];
	}
	sort(a, a + n);
	if (!need(n - 1)) {
		cout << n << endl;
		return 0;
	}
	while (lo != hi) {
		int mid = (lo + hi) / 2;
		if (need(mid)) {
			hi = mid ;
		}
		else {
			lo = mid + 1;
		}
	}
	cout << lo << endl;

	return 0;
}


Compiler output:
a.cc: In function 'bool need(int)':
a.cc:32:25: error: no matching function for call to 'max(int, ll)'
   32 |         for (int i = max(0, k - a[m]); i < k; i++) {
      |                      ~~~^~~~~~~~~~~~~
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:32:25: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'll' {aka 'long long int'})
   32 |         for (int i = max(0, k - a[m]); i < k; i++) {
      |                      ~~~^~~~~~~~~~~~~
/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:2:
/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:32:25: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   32 |         for (int i = max(0, k - a[m]); i < k; i++) {
      |                      ~~~^~~~~~~~~~~~~