Language: C++

#include <bits/stdc++.h>
#define ll long long

const ll inf = 1e9+5;

ll val[mxn], w[mxn];

int n, wt;
using namespace std;

int main(){
    cin>>n>>wt;
  	ll sum_val = 0;
  
    for(int i=0; i<n; ++i){
        ll weight, v;
        cin>>weight>>v;
        val[i] = v;
        w[i] = weight;
      	sum_val += v;
    }
  
  	ll dp[n+1][sum_val+1] = {inf};
  	ll ans = 0LL;
  
  	for(int i=0; i < n; i++){
    	for(int j=0; j <= sum_val; j++){
          	if(j >= val[i])
        		dp[i+1][j] = min(dp[i][j], dp[i-1][j-val[i]]+w[i]);
          	else
              	dp[i+1][j] = dp[i][j];
          
          	if(dp[i+1][j] <= wt)
              	ans = max(ans, j);
        }
    }
   
    cout<<ans<<endl;
    return 0;
}


Compiler output:
a.cc:6:8: error: 'mxn' was not declared in this scope
    6 | ll val[mxn], w[mxn];
      |        ^~~
a.cc:6:16: error: 'mxn' was not declared in this scope
    6 | ll val[mxn], w[mxn];
      |                ^~~
a.cc: In function 'int main()':
a.cc:18:9: error: 'val' was not declared in this scope
   18 |         val[i] = v;
      |         ^~~
a.cc:19:9: error: 'w' was not declared in this scope
   19 |         w[i] = weight;
      |         ^
a.cc:28:25: error: 'val' was not declared in this scope
   28 |                 if(j >= val[i])
      |                         ^~~
a.cc:29:70: error: 'w' was not declared in this scope
   29 |                         dp[i+1][j] = min(dp[i][j], dp[i-1][j-val[i]]+w[i]);
      |                                                                      ^
a.cc:34:26: error: no matching function for call to 'max(long long int&, int&)'
   34 |                 ans = max(ans, 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:34:26: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   34 |                 ans = max(ans, 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:34:26: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   34 |                 ans = max(ans, j);
      |                       ~~~^~~~~~~~