Language: C++

#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <algorithm>
#include <vector>
#include <stack>
using namespace std;
#define REP(i, n) for(int (i)=0; (i)<(n); (i)++)
#define OUT(a) cout << (a) << "\n"
#define ll long long
ll MOD = 10e9 + 7;

pair<ll, ll> a[51][51];

int main() {
    int n;
    cin >> n;
    vector<pair<double, pair<ll, ll> > > xy(n);
    vector<pair<int, pair<ll, ll> > > ans;
    REP(i, n) {
        scanf("%lld %lld", &xy[i].second.first, &xy[i].second.second);
        xy[i].first = sqrt(pow(xy[i].second.first, 2) + pow(xy[i].second.second, 2));
    }
    sort(xy.begin(), xy.end());
    REP(i, n) for(int j=i+1; j<n; j++) {
        a[i][j].first = xy[j].second.first - xy[i].second.first;
        a[i][j].second = xy[j].second.second - xy[i].second.second;
    }
    REP(i, n) for(int j=i+1; j<n; j++) {
        int p = 0;
        for(p=0; p<ans.size(); p++) {
            if (a[i][j] == ans[p].second) {
                ans[p].first++;
                break;
            }
        }
        if (p==ans.size()) {
            ans.push_back(make_pair(1, a[i][j]));
        }
    }
    ll m = 0;
    REP(i, ans.size()) {
        m = max(m, ans[i].first);
    }
    if (n-m <= 0) cout << 1 << endl;
    else cout << n-m << endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:44:16: error: no matching function for call to 'max(long long int&, int&)'
   44 |         m = max(m, ans[i].first);
      |             ~~~^~~~~~~~~~~~~~~~~
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:44:16: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   44 |         m = max(m, ans[i].first);
      |             ~~~^~~~~~~~~~~~~~~~~
/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:5:
/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:44:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   44 |         m = max(m, ans[i].first);
      |             ~~~^~~~~~~~~~~~~~~~~