Language: C++

#include<bits/stdc++.h>
using namespace std;long long a,c[1<<20],n,d,ans,x[1<<20],y[1<<20],k,i;struct node{long long x,y;}w[200005];inline bool cmp(node x,node y){return x.x<y.x;}int main(){cin>>n>>d>>a;d*=2;for(i=1;i<=n;++i){cin>>w[i].x>>w[i].y;w[i].y=(w[i].y+a-1)/a;}sort(w+1,w+n+1,cmp);for(i=a=1;i<=n;++i){while(w[i].x-w[a].x>d)k-=c[a++];ans+=(c[i]=max(0,w[i].y-k));k+=c[i];}cout<<ans;}

Compiler output:
a.cc: In function 'int main()':
a.cc:2:332: error: no matching function for call to 'max(int, long long int)'
    2 | using namespace std;long long a,c[1<<20],n,d,ans,x[1<<20],y[1<<20],k,i;struct node{long long x,y;}w[200005];inline bool cmp(node x,node y){return x.x<y.x;}int main(){cin>>n>>d>>a;d*=2;for(i=1;i<=n;++i){cin>>w[i].x>>w[i].y;w[i].y=(w[i].y+a-1)/a;}sort(w+1,w+n+1,cmp);for(i=a=1;i<=n;++i){while(w[i].x-w[a].x>d)k-=c[a++];ans+=(c[i]=max(0,w[i].y-k));k+=c[i];}cout<<ans;}
      |                                                                                                                                                                                                                                                                                                                                         ~~~^~~~~~~~~~~~
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:2:332: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
    2 | using namespace std;long long a,c[1<<20],n,d,ans,x[1<<20],y[1<<20],k,i;struct node{long long x,y;}w[200005];inline bool cmp(node x,node y){return x.x<y.x;}int main(){cin>>n>>d>>a;d*=2;for(i=1;i<=n;++i){cin>>w[i].x>>w[i].y;w[i].y=(w[i].y+a-1)/a;}sort(w+1,w+n+1,cmp);for(i=a=1;i<=n;++i){while(w[i].x-w[a].x>d)k-=c[a++];ans+=(c[i]=max(0,w[i].y-k));k+=c[i];}cout<<ans;}
      |                                                                                                                                                                                                                                                                                                                                         ~~~^~~~~~~~~~~~
/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:2:332: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
    2 | using namespace std;long long a,c[1<<20],n,d,ans,x[1<<20],y[1<<20],k,i;struct node{long long x,y;}w[200005];inline bool cmp(node x,node y){return x.x<y.x;}int main(){cin>>n>>d>>a;d*=2;for(i=1;i<=n;++i){cin>>w[i].x>>w[i].y;w[i].y=(w[i].y+a-1)/a;}sort(w+1,w+n+1,cmp);for(i=a=1;i<=n;++i){while(w[i].x-w[a].x>d)k-=c[a++];ans+=(c[i]=max(0,w[i].y-k));k+=c[i];}cout<<ans;}
      |                                                                                                                                                                                                                                                                                                                                         ~~~^~~~~~~~~~~~