Language: C++

#include <iostream>
#include <string>
#include <unordered_map>
#include <stdio.h>
#include <list>
#include <vector>
#include <algorithm>
#include <stack>
#include <climits>
#include <cmath>
#include <queue>
using namespace std;
#define rep(i, n) for(int i = 0; i < n; ++i)
#define ALL(v) v.begin(), v.end()
typedef long long ll;

struct rec
{
	int s,t,c;
	bool operator<(const rec &another) const
    {
        if(c!=another.c)return c<another.c;
		  return s < another.s;
    };
};



int main()
{
	int n,c;cin >> n >> c;
	vector<ll> lap(100005);
	vector<rec> stc(n);
	rep(i,n)
	{
		cin >> stc[i].s >>stc[i].t>>stc[i].c;
	}

	sort(stc.begin(),stc.end());


	rep(i,n-1)
	{
		if(stc[i].t==stc[i+1].s&&stc[i].c==stc[i].c)
		{
			stc[i].t=stc[i+1].t;
			stc.erase(stc.begin()+i+1);
		}
	}

	rep(i,100005)lap[i]=0;

	rep(i,stc.size())
	{
		lap[stc[i].s]++;
		lap[stc[i].t+1]--;
	}
	rep(i,100004)
	{
		lap[i+1]+=lap[i];
	}

	int ans=0;
	rep(i,100005)ans = max(ans,lap[i]);

	//rep(i,15)cout<<lap[i];cout<<endl;
	cout<<ans<<endl;

	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:64:31: error: no matching function for call to 'max(int&, __gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type&)'
   64 |         rep(i,100005)ans = max(ans,lap[i]);
      |                            ~~~^~~~~~~~~~~~
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:64:31: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'})
   64 |         rep(i,100005)ans = max(ans,lap[i]);
      |                            ~~~^~~~~~~~~~~~
/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:7:
/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:64:31: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   64 |         rep(i,100005)ans = max(ans,lap[i]);
      |                            ~~~^~~~~~~~~~~~