Language: C++

#include <iostream>
#include <limits.h>
#include <algorithm>

int main()
{
	int n, m, r;
	std::cin >> n >> m >> r;
	
	int rs[100];
	for (int i = 0; i < r; ++i)
	{
		std::cin >> rs[i];
		--rs[i];
	}
	
	long long int dist[310][310] = { 0 };
	for (int i = 0; i < n; ++i)
	{
		for (int j = 0; j < n; ++j)
		{
			if (i != j)
				dist[i][j] = LONG_MAX;
		}
	}
	
	for (int i = 0; i < m; ++i)
	{
		int a, b, c;
		std::cin >> a >> b >> c;
		--a;
		--b;
		
		dist[a][b] = std::min(dist[a][b], c);
		dist[b][a] = std::min(dist[b][a], c);
	}
	
	for (int k = 0; k < n; ++k)
	{
		for (int i = 0; i < n; ++i)
		{
			for (int j = 0; j < n; ++j)
			{
				if (dist[i][j] > dist[i][k] + dist[k][j])
				{
					dist[i][j] = dist[i][k] + dist[k][j];
					dist[j][i] = dist[i][k] + dist[k][j];
				}
			}
		}
	}
	
	std::sort(rs, rs + r);
	
	long long int ans = LLONG_MAX;
	do
	{
		long long int count = 0;
		
		for (int i = 1; i < r; ++i)
			count += dist[rs[i - 1]][rs[i]];
		
		ans = std::min(ans, count);
	} while (std::next_permutation(rs, rs + r));
	
	std::cout << ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:34:38: error: no matching function for call to 'min(long long int&, int&)'
   34 |                 dist[a][b] = std::min(dist[a][b], c);
      |                              ~~~~~~~~^~~~~~~~~~~~~~~
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: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:34:38: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   34 |                 dist[a][b] = std::min(dist[a][b], c);
      |                              ~~~~~~~~^~~~~~~~~~~~~~~
/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,
                 from a.cc:3:
/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:34:38: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   34 |                 dist[a][b] = std::min(dist[a][b], c);
      |                              ~~~~~~~~^~~~~~~~~~~~~~~
a.cc:35:38: error: no matching function for call to 'min(long long int&, int&)'
   35 |                 dist[b][a] = std::min(dist[b][a], c);
      |                              ~~~~~~~~^~~~~~~~~~~~~~~
/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:35:38: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
   35 |                 dist[b][a] = std::min(dist[b][a], c);
      |                              ~~~~~~~~^~~~~~~~~~~~~~~
/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
/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:35:38: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   35 |                 dist[b][a] = std::min(dist[b][a], c);
      |                              ~~~~~~~~^~~~~~~~~~~~~~~