Language: C++

#include<bits/stdc++.h>
using namespace std;

typedef long long int ll;
typedef vector<int> vi;
typedef set<int> si;
typedef set<ll> sll;
typedef vector<ll> vll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define pvec(v) for(auto e: v) cout << e << " ";
#define IO ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define rep(i, a, b) for(int i = (a); i<(b); ++i)
#define pb push_back
#define INF 1000000005
#define MOD 1000000007
#define all(v) v.begin(), v.end()

void debug_out() { cerr << endl; }
template <typename Head, typename... Tail>
void debug_out(Head H, Tail... T) {
  cerr << " " << to_string(H);
  debug_out(T...);
}
#define debug(...) cerr << "[" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__)

ll power(ll x, ll y, ll p = MOD){  
    ll res = 1LL; 
    x = x % p;
    if (x == 0) return 0;
    while (y > 0){
        if (y & 1LL)  
            res = (res*x) % p;
        y = y>>1LL; 
        x = (x*x) % p;  
    }  
    return res;  
}  

int main(){
	IO
	int n, w;
	cin >> n >> w;
	vll prev(100005, 0), curr(100005, -1);

	ll value, weight;
	rep(i, 1, n + 1){
		cin >> weight >> value;
		for(int val = 0; val<= 100000 ; ++val){
			if(val < value) curr[val] = prev[val];
			else curr[val] = min(prev[val], prev[val - value] + weight);
		}
		prev = curr;
	}

	ll ans = -1;
	rep(i, 0, 100001){
		if(prev[i]<=w)
			ans = max(ans, i);
	}

	cout << ans << endl;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:60:34: error: no matching function for call to 'max(ll&, int&)'
   60 |                         ans = max(ans, i);
      |                               ~~~^~~~~~~~
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:60:34: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   60 |                         ans = max(ans, 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:
/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:60:34: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   60 |                         ans = max(ans, i);
      |                               ~~~^~~~~~~~