Language: C++

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<ll,ll> P;

#define fr first
#define sc second
#define chmax(a,b) a=max(a,b)
#define chmin(a,b) a=min(a,b)

int main(){
	static ll n,c;
	static ll x[2][100010],v[100010];
	scanf("%lld%lld",&n,&c);
	for(int i=0;i<n;i++){
		scanf("%lld%lld",&x[0][i],&v[i]);
		x[1][i]=c-x[0][i];
	}
	reverse(x[1],x[1]+n);
	
	static ll sum[2][100010]={};
	for(int i=0;i<n;i++){
		if(i==0){
			sum[0][i]=v[i]-x[0][i];
			sum[1][i]=v[n-1]-x[1][i];
		}
		else {
			sum[0][i]=sum[0][i-1]+v[i]-(x[0][i]-x[0][i-1]);
			sum[1][i]=sum[1][i-1]+v[n-1-i]-(x[1][i]-x[1][i-1]);
		}
	}
	static ll MAX[2][100010];
	for(int i=0;i<n;i++){
		MAX[0][i]=sum[0][i];
		MAX[1][i]=sum[1][i];
	}
	for(int i=1;i<=n-1;i++){
		chmax(MAX[0][i],MAX[0][i-1]);
		chmax(MAX[1][i],MAX[1][i-1]);
	}
	ll ret=max(MAX[0][n-1],MAX[1][n-1]);
	for(int i=0;i<n-1;i++){
		chmax(ret,sum[0][i]-x[0][i]+MAX[1][n-2-i]);
		chmax(ret,sum[1][i]-x[1][i]+MAX[0][n-2-i]);
	}
	chmax(ret,0);
	cout<<ret<<endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:9:25: error: no matching function for call to 'max(ll&, int)'
    9 | #define chmax(a,b) a=max(a,b)
      |                      ~~~^~~~~
a.cc:47:9: note: in expansion of macro 'chmax'
   47 |         chmax(ret,0);
      |         ^~~~~
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:9:25: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'int')
    9 | #define chmax(a,b) a=max(a,b)
      |                      ~~~^~~~~
a.cc:47:9: note: in expansion of macro 'chmax'
   47 |         chmax(ret,0);
      |         ^~~~~
/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:9:25: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
    9 | #define chmax(a,b) a=max(a,b)
      |                      ~~~^~~~~
a.cc:47:9: note: in expansion of macro 'chmax'
   47 |         chmax(ret,0);
      |         ^~~~~