Language: C++

#include <bits/stdc++.h>

int main(){
    int n, w;
    std::cin>>n>>w;
    std::vector<std::vector<int>> dp(static_cast<unsigned int>(n + 1), std::vector<int>(n * w+1, 0));
    dp[0][0]=0;
    for (int i = 1; i <=n*w ; ++i) {
        dp[0][i]=1000000001;
    }
    std::vector<int> iv;
    std::vector<long> iw;
    for (int i = 0; i < n; ++i) {
        int a,b;
        std::cin>>a>>b;
        iv.emplace_back(a);
        iw.emplace_back(b);
    }
    for (int i = 1; i <= n; ++i) {
        for (int j = 0; j <= n*w; ++j) {
            if(j<iv[i-1])dp[i][j]=dp[i-1][j];
            else dp[i][j]=std::min(dp[i-1][j],dp[i-1][j-iv[i-1]]+iw[i-1]);
        }
    }
    int ans=0;
    for (int i = 0; i <= n*w; ++i) {
        if(dp[n][i]<=w)ans=i;
    }
    std::cout<<ans<<std::endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:22:35: error: no matching function for call to 'min(__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type&, __gnu_cxx::__alloc_traits<std::allocator<long int>, long int>::value_type)'
   22 |             else dp[i][j]=std::min(dp[i-1][j],dp[i-1][j-iv[i-1]]+iw[i-1]);
      |                           ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:22:35: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long int>, long int>::value_type' {aka 'long int'})
   22 |             else dp[i][j]=std::min(dp[i-1][j],dp[i-1][j-iv[i-1]]+iw[i-1]);
      |                           ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: 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:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:22:35: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   22 |             else dp[i][j]=std::min(dp[i-1][j],dp[i-1][j-iv[i-1]]+iw[i-1]);
      |                           ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~