Language: C++

#include <bits/stdc++.h>
#define REP(i,n) for(int i=0;i<(n);++i)
#define ALL(v)   (v).begin(),(v).end()
#define debug(x) cerr<<#x<<": "<<(x)<<endl
#define INF      (int)1e9
#define EPS      (double)1e-9
#define MOD      ((int)1e9+7)
using namespace std;
typedef long long     llong;
typedef vector<int>   vi;
typedef vector<vi >   vvi;
typedef vector<vvi >  vvvi;
typedef pair<int,int> pii;
template<class Type> void line(const Type &a){int cnt=0;for(const auto &elem:a){if(cnt++)cout<<' ';cout<<elem;}cout<<endl;}

int main(){
	int k;
	string s;
	cin>>k>>s;
	
	REP(i,min(k,s.size())) cout<<s[i];
	if(s.size()>k) cout<<"...";
	cout<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:21:18: error: no matching function for call to 'min(int&, std::__cxx11::basic_string<char>::size_type)'
   21 |         REP(i,min(k,s.size())) cout<<s[i];
      |               ~~~^~~~~~~~~~~~
a.cc:2:33: note: in definition of macro 'REP'
    2 | #define REP(i,n) for(int i=0;i<(n);++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:21:18: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'})
   21 |         REP(i,min(k,s.size())) cout<<s[i];
      |               ~~~^~~~~~~~~~~~
a.cc:2:33: note: in definition of macro 'REP'
    2 | #define REP(i,n) for(int i=0;i<(n);++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:21:18: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   21 |         REP(i,min(k,s.size())) cout<<s[i];
      |               ~~~^~~~~~~~~~~~
a.cc:2:33: note: in definition of macro 'REP'
    2 | #define REP(i,n) for(int i=0;i<(n);++i)
      |                                 ^