Language: C++

#include<bits/stdc++.h>
#define all(x) (x).begin(),(x).end()
typedef long long ll;
#define rep(i,n) for(ll i=0, i##_len=(n); i<i##_len; ++i)
using namespace std;
#define sz(x) ((int)(x).size())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
#define MEMSET(v, h) memset((v), h, sizeof(v))
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
#define pb push_back
#define mp make_pair
#define y0 y3487465
#define y1 y8687969
#define j0 j1347829
#define j1 j234892
ll gcd(ll a,ll b){return b?gcd(b,a%b):a;}
const ll INF = 1LL<<60;
 
int main() {
	ll n,m;
  	cin >> n >> m;
  	ll ans = 0;
  	vector<ll> x(m);
  	rep(i,m){
      cin >> x[i];
    }
  	sort(all(x));
  	vector<ll> diffs;
    for (int i = 1; i < x.size(); ++i) diffs.push_back(x[i] - x[i-1]);
    sort(all(diffs), greater<ll>());
        
    long long res = x.back() - x[0];
    for (ll i = 0; i < min(diffs.size(), n-1); ++i) ans -= diffs[i];
  	cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:35:27: error: no matching function for call to 'min(std::vector<long long int>::size_type, ll)'
   35 |     for (ll i = 0; i < min(diffs.size(), n-1); ++i) ans -= diffs[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:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:35:27: note:   deduced conflicting types for parameter 'const _Tp' ('long unsigned int' and 'll' {aka 'long long int'})
   35 |     for (ll i = 0; i < min(diffs.size(), n-1); ++i) ans -= diffs[i];
      |                        ~~~^~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: 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:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:35:27: note:   mismatched types 'std::initializer_list<_Tp>' and 'long unsigned int'
   35 |     for (ll i = 0; i < min(diffs.size(), n-1); ++i) ans -= diffs[i];
      |                        ~~~^~~~~~~~~~~~~~~~~~~