Language: C++

#include "bits/stdc++.h"

using namespace std;

//int N,M,K,L,R,H,W;
long long int N,M,K,L,R,H,W;

constexpr long long int MOD=1000000007;
//constexpr  int MOD=1000000007;
//constexpr int MOD=998244353;
//constexpr long long int MOD=998244353;

constexpr long double EPS=1e-8;


int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	
	cin>>N>>K;
	vector<pair<int,int>>v(N);
	for(auto &i:v)cin>>i.first>>i.second;
	vector<int>ans(N);
	for(int i=0;i<N;i++)ans[i]=v[i].second;
	vector<vector<int>>dp(N,vector<int>(K));
	for(int i=0;i<N-1;i++){
		for(int k=K-1;k>=v[i].first;k--)dp[i+1][k]=max(dp[i+1][k],dp[i][k-v[i].first]+v[i].second);
		for(int k=v[i].first-1;k>=0;k--)dp[i+1][k]=dp[i][k];
	}
	vector<vector<int>>rev_dp(N,vector<int>(K));
	for(int i=N-1;i>0;i--){
		for(int k=K-1;k>=v[i].first;k--)rev_dp[i-1][k]=max(rev_dp[i-1][k],rev_dp[i][k-v[i].first]+v[i].second);
		for(int k=v[i].first-1;k>=0;k--)rev_dp[i-1][k]=rev_dp[i][k];
	}
	for(int i=0;i<N;i++){
		int add=0;
		for(int j=0;j<K;j++){
			add=max(add,dp[i][j]+rev_dp[i][K-1-j]);
		}
		ans[i]+=add;
	}
	cout<<*max_element(ans.begin(),ans,end())<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:47: error: no matching function for call to 'end()'
   42 |         cout<<*max_element(ans.begin(),ans,end())<<endl;
      |                                            ~~~^~
In file included from /usr/include/c++/14/bits/algorithmfwd.h:39,
                 from /usr/include/c++/14/bits/stl_algo.h:59,
                 from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/initializer_list:99:5: note: candidate: 'template<class _Tp> constexpr const _Tp* std::end(initializer_list<_Tp>)'
   99 |     end(initializer_list<_Tp> __ils) noexcept
      |     ^~~
/usr/include/c++/14/initializer_list:99:5: note:   candidate expects 1 argument, 0 provided
In file included from /usr/include/c++/14/string:53,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/bits/range_access.h:74:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.end()) std::end(_Container&)'
   74 |     end(_Container& __cont) -> decltype(__cont.end())
      |     ^~~
/usr/include/c++/14/bits/range_access.h:74:5: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/range_access.h:85:5: note: candidate: 'template<class _Container> constexpr decltype (__cont.end()) std::end(const _Container&)'
   85 |     end(const _Container& __cont) -> decltype(__cont.end())
      |     ^~~
/usr/include/c++/14/bits/range_access.h:85:5: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/range_access.h:106:5: note: candidate: 'template<class _Tp, long unsigned int _Nm> constexpr _Tp* std::end(_Tp (&)[_Nm])'
  106 |     end(_Tp (&__arr)[_Nm]) noexcept
      |     ^~~
/usr/include/c++/14/bits/range_access.h:106:5: note:   candidate expects 1 argument, 0 provided
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166:
/usr/include/c++/14/valarray:1249:5: note: candidate: 'template<class _Tp> _Tp* std::end(valarray<_Tp>&)'
 1249 |     end(valarray<_Tp>& __va) noexcept
      |     ^~~
/usr/include/c++/14/valarray:1249:5: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/valarray:1265:5: note: candidate: 'template<class _Tp> const _Tp* std::end(const valarray<_Tp>&)'
 1265 |     end(const valarray<_Tp>& __va) noexcept
      |     ^~~
/usr/include/c++/14/valarray:1265:5: note:   candidate expects 1 argument, 0 provided