Language: C++

#include <bits/stdc++.h>
using namespace std;
#define fastio ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL)
#define lli long long int
#define tc int t;cin>>t;while(t--)
#define all(x) x.begin(),x.end()
#define f first
#define s second
#define pb push_back
#define vi vector<int>
#define vll vector<lli>
#define vpi vector<pair<int,int> > 
#define vpll vector<pair<lli,lli> > 
#define vvi vector<vector<int> >
#define vvll vector<vector<lli> >
#define maxn 500005
#define mod 1000000007
#define inf 10000000000000000



int main()
{
    fastio;
    int n,k;
    cin>>n>>k;
    vi p(n),c(n);
    for(int i=0;i<n;i++)
    cin>>p[i],p[i]--;
    for(int i=0;i<n;i++)
    cin>>c[i];
    bitset<5001> fr;
    lli ans=-1e15;
    for(int i=0;i<n;i++)
    {
        int st=p[i];
        vi cur;cur.pb(st);
        while(st!=i)
        {
            st=p[st];
            cur.pb(st);
        }
        int n1=cur.size();
        lli tot=0,pm=-1e15,pm2=-1e15;
        lli num=k/n1;
        lli rem=k%n1;
        for(int i=0;i<n1;i++)
        {
            if(i<k) tot+=c[cur[i]],ans=max(ans,tot),pm=max(pm,tot);
            if(i<rem) pm2=max(pm2,tot);
        }
        ans=max(ans,num*tot+max(pm2,0));
        if(num>=1)
        ans=max(ans,(num-1)*tot+pm);
    }
    cout<<ans<<"\n";
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:52:32: error: no matching function for call to 'max(long long int&, int)'
   52 |         ans=max(ans,num*tot+max(pm2,0));
      |                             ~~~^~~~~~~
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:52:32: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   52 |         ans=max(ans,num*tot+max(pm2,0));
      |                             ~~~^~~~~~~
/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:52:32: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   52 |         ans=max(ans,num*tot+max(pm2,0));
      |                             ~~~^~~~~~~