Language: C++

#include <iostream>
#include <vector>
#include <queue>
#include <set>
#include <map>
#include <algorithm>
#include <iomanip>
#include <cmath>
using namespace std;

void solve(){
  long long n, ans = 0; cin >> n;
  vector<int> l(n), sum(2001, 0);
  for(int i = 0; i < n; i++){
    cin >> l[i];
  }
  sum[0] = 0;
  int j = 0;
  for(int i = 0; i < n; i++){
    sum[l[i]]++;
  }
  for(int i = 1; i <= 2000; i++){
    sum[i] += sum[i - 1];
  }
  for(int i = 0; i < n - 1; i++){
    for(int j = i + 1; j < n; j++){
      int a = l[i], b = l[j];
      //cout << a << " " << b << " -> ";
      long long left = abs(a - b), right = a + b, t;
      t = sum[right - 1] - sum[left];
      //cout << left << " < c < " << right << endl;
      //cout << t << endl;
      if(a > left && a < right) t--;
      if(b > left && b < right) t--;
      //cout << t << endl;
      ans += max(t, 0);
    }
  }
  cout << ans / 3<< endl;

  return;
}

int main(){
  solve();
  return 0;
}


Compiler output:
a.cc: In function 'void solve()':
a.cc:36:17: error: no matching function for call to 'max(long long int&, int)'
   36 |       ans += max(t, 0);
      |              ~~~^~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 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:36:17: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   36 |       ans += max(t, 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,
                 from a.cc:6:
/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:36:17: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   36 |       ans += max(t, 0);
      |              ~~~^~~~~~