Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef __int128 LL;
const LL MOD = 1000000007;
#define fr(i, n) for (i = 0; i < n; i++)
#define rep(i, n) for (i = 1; i <= n; i++)
#define lcm(x, y) ((x) * (y) / __gcd((x), (y)))
#define pb push_back
#define all(c) (c).begin(), (c).end()
#define debug(x) cout << #x << " : " << x << endl
#define part cout << "----------------------------------\n";
#include <iostream>
#define intCeil(a, b) ((a) + (b)-1) / (b)

#define fastinput                     \
    ios_base::sync_with_stdio(false); \
    cin.tie(NULL);                    \
    cout.tie(NULL);
const int M = 5100;
vector<LL> adj[M];
vector<bool> visited(M, false);
vector<LL> val(M);
LL k_lim;
vector<LL> v;
LL INF, maxima = 10000000000000000;;

LL compute()
{
    LL sz = v.size();

    LL sum = 0;
    //debug(sz);
    for (auto x : v)
    {
        sum += x;
    }

    LL divisor = k_lim / sz;
    LL rem = k_lim % sz;

    if (rem == 0)
    {
        if (sum > 0)
        {
            return sum * divisor;
        }
        else
        {
            return sum;
        }
    }
    // for (int i = 0; i < rem; i++)
    // {
    //     v.pb(v[i]);
    // }
    //sz = v.size();
    LL max_till_now = -INF;
    for (int i = 0; i < sz; i++)
    {
        LL now = -INF, now_sum = 0;

        for (int j = 1; j <= rem; j++)
        {

            now_sum += v[(i + j - 1) % sz];
            now = max(now, now_sum);
        }
        max_till_now = max(max_till_now, now);
        //debug(now);
    }
    LL addend = max_till_now;
    LL ans = 0;
    if (sum > 0)
    {
        ans += divisor * sum;
    }
    ans += addend;
    return ans;
}

void dfs(LL s)
{
    if (!visited[s])
    {
        visited[s] = true;
        v.pb(val[s]);
        for (auto x : adj[s])
        {
            dfs(x);
        }
    }
}

int main()
{
    fastinput;
    INF = maxima;
    maxima *= -1;
    LL n, i, j, t, temp, tc;
    cin >> n >> k_lim;
    for (i = 0; i < n; i++)
    {
        cin >> j;
        adj[i + 1].pb(j);
    }
    for (i = 1; i <= n; i++)
    {
        cin >> val[i];
        maxima = max(maxima, val[i]);
    }

    for (i = 1; i <= n; i++)
    {
        if (!visited[i])
        {
            // debug(i);
            v.clear();
            dfs(i);
            LL check = compute();
            maxima = max(maxima, check);
            // part;
        }
    }
    cout << maxima << endl;

    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:100:9: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'LL' {aka '__int128'})
  100 |     cin >> n >> k_lim;
      |     ~~~ ^~ ~
      |     |      |
      |     |      LL {aka __int128}
      |     std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'short int&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'short unsigned int&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'int&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'unsigned int&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'long int&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'long unsigned int&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'long long int&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'long long unsigned int&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:219:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  219 |       operator>>(float& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:219:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'float&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:223:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  223 |       operator>>(double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:223:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'double&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:227:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  227 |       operator>>(long double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:227:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: cannot bind non-const lvalue reference of type 'long double&' to a value of type 'LL' {aka '__int128'}
  100 |     cin >> n >> k_lim;
      |            ^
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: invalid conversion from 'LL' {aka '__int128'} to 'void*' [-fpermissive]
  100 |     cin >> n >> k_lim;
      |            ^
      |            |
      |            LL {aka __int128}
a.cc:100:12: error: cannot bind rvalue '(void*)((long int)n)' to 'void*&'
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: invalid conversion from 'LL' {aka '__int128'} to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
  100 |     cin >> n >> k_lim;
      |            ^
      |            |
      |            LL {aka __int128}
/usr/include/c++/14/istream:126:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__ios_type& (*)(__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>; __ios_type = std::basic_ios<char>]' (near match)
  126 |       operator>>(__ios_type& (*__pf)(__ios_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:126:7: note:   conversion of argument 1 would be ill-formed:
a.cc:100:12: error: invalid conversion from 'LL' {aka '__int128'} to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'} [-fpermissive]
  100 |     cin >> n >> k_lim;
      |            ^
      |            |
      |            LL {aka __int128}
/usr/include/c++/14/istream:133:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istre