Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,j,n) for(int i=(int)(j);i<(int)(n);i++)
#define REP(i,j,n) for(int i=(int)(j);i<=(int)(n);i++)
#define MOD 1000000007
#define int long long
#define ALL(a) (a).begin(),(a).end()
#define vi vector<int>
#define vii vector<vi>
#define pii pair<int,int>
#define priq priority_queue<int>
#define disup(A,key) distance(A.begin(),upper_bound(ALL(A),(int)(key)))
#define dislow(A,key) distance(A.begin(),lower_bound(ALL(A),(int)(key)))
#define tii tuple<int,int,int>
signed main(){
  int N,W;
  cin>>N>>W;
  vector<pii> A(N);
  rep(i,0,N) cin>>A.at(i).first>>A.at(i).second;
  vii dp(N+1,vi(W+1));
  REP(i,1,N){
    REP(j,1,W){
      if(A.at(i-1).first<=j)
        dp.at(i).at(j)=max(dp.at(i-1).at(j-A.at(i-1).first)+A.at(i-1).second,1);//dp.at(i-1).at(j));
      else
        dp.at(i).at(j)=dp.at(i-1).at(j);
    }
  }
  cout<<dp.at(N).at(W)<<endl;
  }



Compiler output:
a.cc: In function 'int main()':
a.cc:24:27: error: no matching function for call to 'max(__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type, int)'
   24 |         dp.at(i).at(j)=max(dp.at(i-1).at(j-A.at(i-1).first)+A.at(i-1).second,1);//dp.at(i-1).at(j));
      |                        ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:24:27: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   24 |         dp.at(i).at(j)=max(dp.at(i-1).at(j-A.at(i-1).first)+A.at(i-1).second,1);//dp.at(i-1).at(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:
/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:24:27: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   24 |         dp.at(i).at(j)=max(dp.at(i-1).at(j-A.at(i-1).first)+A.at(i-1).second,1);//dp.at(i-1).at(j));
      |                        ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~