Language: C++

#include<bits/stdc++.h>
using namespace std;
#define rep(i,j,n) for(int i=(int)(j);i<(int)(n);i++)
#define REP(i,j,n) for(int i=(int)(j);i<=(int)(n);i++)
#define MOD 1000000007
#define int long long
#define ALL(a) (a).begin(),(a).end()
#define vi vector<int>
#define vii vector<vi>
#define pii pair<int,int>
#define priq priority_queue<int>
#define disup(A,key) distance(A.begin(),upper_bound(ALL(A),(int)(key)))
#define dislow(A,key) distance(A.begin(),lower_bound(ALL(A),(int)(key)))
const MAX=100001;
signed main(){
  int N,C; cin>>N>>C;
  vector<bitset<30>> B;
  rep(i,0,N){
    int S,T,X;
    cin>>S>>T>>X;
    REP(j,S-1,T)B[X-1].set(j);
    }
  int ans=0;
  REP(i,0,MAX) ans=max(ans,B[i].count());
  cout<<ans<<endl;
  }


Compiler output:
a.cc:14:7: error: 'MAX' does not name a type
   14 | const MAX=100001;
      |       ^~~
a.cc: In function 'int main()':
a.cc:24:11: error: 'MAX' was not declared in this scope
   24 |   REP(i,0,MAX) ans=max(ans,B[i].count());
      |           ^~~
a.cc:4:48: note: in definition of macro 'REP'
    4 | #define REP(i,j,n) for(int i=(int)(j);i<=(int)(n);i++)
      |                                                ^
a.cc:24:23: error: no matching function for call to 'max(long long int&, std::size_t)'
   24 |   REP(i,0,MAX) ans=max(ans,B[i].count());
      |                    ~~~^~~~~~~~~~~~~~~~~~
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: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:24:23: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'std::size_t' {aka 'long unsigned int'})
   24 |   REP(i,0,MAX) ans=max(ans,B[i].count());
      |                    ~~~^~~~~~~~~~~~~~~~~~
/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:
/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:24:23: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   24 |   REP(i,0,MAX) ans=max(ans,B[i].count());
      |                    ~~~^~~~~~~~~~~~~~~~~~