Language: C++

#include <iostream>
#include <vector>
#include <array>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <string>
#include <sstream>
#include <algorithm>
#include <random>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctime>
#include <cmath>
#include <cassert>
#include <climits>
#include <bitset>
#include <functional>
#include <iomanip>
#include <random>


#define FOR_LT(i, beg, end) for (int i = beg; i < end; i++)
#define FOR_LE(i, beg, end) for (int i = beg; i <= end; i++)
#define FOR_DW(i, beg, end) for (int i = beg; end <= i; i--)

using namespace std;

int64_t pow_rem(int64_t x, int64_t m, int64_t rem)
{
	if (m == 0) {
		return 1;
	}
	if (m == 1) {
		return x;
	}

	if (m & 1) {
		int64_t val = pow_rem(x, m / 2, rem);
		val = val * val;
		val %= rem;
		val *= x;
		val %= rem;
		return val;
	}
	else {
		int64_t val = pow_rem(x, m / 2, rem);
		val = val * val;
		val %= rem;
		return val;
	}
}

int64_t pow_remdiv(int64_t val, int64_t rem)
{
	return pow_rem(val, rem - 2, rem);
}

int64_t divide_rem(int64_t divident, int64_t dividor, int64_t rem)
{
	int64_t ret = pow_remdiv(dividor, rem);
	ret *= divident;
	ret %= rem;

	return ret;
}

vector<int64_t> factors;
vector<int64_t> finvs;
void precalc_nCr(int n, int64_t rem) {
	factors = vector<int64_t>(n + 1);
	finvs = vector<int64_t>(n + 1);

	{
		int64_t f = 1;
		factors[0] = 1;
		FOR_LE(i, 1, n) {
			f *= i;
			f %= rem;
			factors[i] = f;
		}
	}
	{
		int64_t inv = divide_rem(1, factors[n], rem);
		finvs[n] = inv;
		FOR_DW(i, n - 1, 0) {
			inv *= i + 1;
			inv %= rem;
			finvs[i] = inv;
		}
	}
}

int64_t nCr_postcalc(int n, int k, int64_t rem) {
	int64_t val = factors[n];
	val *= finvs[n - k];
	val %= rem;
	val *= finvs[k];
	val %= rem;
	return val;
}

int64_t kRem = 1000000007;

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout << fixed << setprecision(20);

	int64_t n, k; cin >> n >> k;
	int64_t minm = std::max(n - k, 1ll);

	precalc_nCr(n, kRem);

	int64_t ans = 0;
	FOR_LE(i, minm, n) {
		int64_t cur = nCr_postcalc(n, i, kRem);
		cur *= nCr_postcalc(n - 1, i - 1, kRem);
		cur %= kRem;
		ans += cur;
		ans %= kRem;
	}
	cout << ans << endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:118:32: error: no matching function for call to 'max(int64_t, long long int)'
  118 |         int64_t minm = std::max(n - k, 1ll);
      |                        ~~~~~~~~^~~~~~~~~~~~
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:118:32: note:   deduced conflicting types for parameter 'const _Tp' ('long int' and 'long long int')
  118 |         int64_t minm = std::max(n - k, 1ll);
      |                        ~~~~~~~~^~~~~~~~~~~~
/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:14:
/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:118:32: note:   mismatched types 'std::initializer_list<_Tp>' and 'long int'
  118 |         int64_t minm = std::max(n - k, 1ll);
      |                        ~~~~~~~~^~~~~~~~~~~~