Language: C++

#include<bits/stdc++.h>

using namespace std;

typedef pair<int,int> P;

const int MAX_N = 100000;
const int MAX_V = 1000000000;
int N;
int X[MAX_N];
int L[MAX_V];

void input(){
  cin >> N;
  for(int i = 0; i < N; i++){
    cin >> X + i >> L + i;
  }
}

P ps[MAX_N];

int solve(){
  for(int i = 0; i < N; i++){
    ps[i] = P(X[i] + L[i], X[i] - L[i]);
  }

  sort(ps,ps + N);
  int cur = -MAX_V;
  int ans = 0;
  for(int i = 0; i < N; i++){
    if(cur <= ps[i].second){
      ans++;
      cur = ps[i].first;
    }
  }

  return ans;
}


int main(){
  input();
  int ans = solve();
  cout << ans;

  return 0;
}

Compiler output:
a.cc: In function 'void input()':
a.cc:16:9: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'int*')
   16 |     cin >> X + i >> L + i;
      |     ~~~ ^~ ~~~~~
      |     |        |
      |     |        int*
      |     std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'int*'
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: invalid conversion from 'int*' to 'short int' [-fpermissive]
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
      |              |
      |              int*
a.cc:16:14: error: cannot bind rvalue '(short int)(((int*)(& X)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'short int&'
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: invalid conversion from 'int*' to 'short unsigned int' [-fpermissive]
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
      |              |
      |              int*
a.cc:16:14: error: cannot bind rvalue '(short unsigned int)(((int*)(& X)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'short unsigned int&'
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: invalid conversion from 'int*' to 'int' [-fpermissive]
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
      |              |
      |              int*
a.cc:16:14: error: cannot bind rvalue '(int)(((int*)(& X)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'int&'
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: invalid conversion from 'int*' to 'unsigned int' [-fpermissive]
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
      |              |
      |              int*
a.cc:16:14: error: cannot bind rvalue '(unsigned int)(((int*)(& X)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'unsigned int&'
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: invalid conversion from 'int*' to 'long int' [-fpermissive]
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
      |              |
      |              int*
a.cc:16:14: error: cannot bind rvalue '(long int)(((int*)(& X)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'long int&'
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: invalid conversion from 'int*' to 'long unsigned int' [-fpermissive]
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
      |              |
      |              int*
a.cc:16:14: error: cannot bind rvalue '(long unsigned int)(((int*)(& X)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'long unsigned int&'
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: invalid conversion from 'int*' to 'long long int' [-fpermissive]
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
      |              |
      |              int*
a.cc:16:14: error: cannot bind rvalue '(long long int)(((int*)(& X)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'long long int&'
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: invalid conversion from 'int*' to 'long long unsigned int' [-fpermissive]
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
      |              |
      |              int*
a.cc:16:14: error: cannot bind rvalue '(long long unsigned int)(((int*)(& X)) + ((sizetype)(((long unsigned int)i) * 4)))' to 'long long unsigned int&'
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:16:14: error: cannot bind non-const lvalue reference of type 'void*&' to an rvalue of type 'void*'
   16 |     cin >> X + i >> L + i;
      |            ~~^~~
/usr/include/c++/14/istream:219:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  219 |       operator>>(float& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:219:25: note:   no known conversion for argument 1 from 'int*' to 'float&'
  219 |       operator>>(float& __f)
      |                  ~~~~~~~^~~
/usr/include/c++/14/istream:223:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  223 |       operator>>(double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:223:26: note:   no known conversion for argument 1 from 'int*' to 'double&'
  223 |       operator>>(double& __f)
      |                  ~~~~~~~~^~~
/usr/include/c++/14/istream:227:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  227 |       operator>>(long double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:227:31: note:   no known conversion for argument 1 from 'int*' to 'long double&'
  227 |       operator>>(long double& __f)
      |                  ~~~~~~~~~~~~~^~~
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]'
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:36: note:   no known conversion for argument 1 from 'int*' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'}
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |                  ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/istream:126:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__ios_type& (*)(__ios_type&)) [with _CharT = char; _Traits