Language: C++

#include <bits/stdc++.h>
 
using namespace std;
 
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll, ll> P;
typedef pair<ll, P> PP;
 
static const double EPS = 1e-8;
static const double PI = 4.0 * atan(1.0);
static const ll INF = 1023456789;
 
#define REP(i,n)	for(int i=0;i<n;++i)
#define REPR(i,n)	for(int i=n-1;i>=0;--i)
#define FOR(i,s,n)	for(int i=s;i<n;++i)
#define FORR(i,s,n)	for(int i=n-1;i>=s;--i)
#define ALL(c)		(c).begin(),(c).end()
#define CLEAR(v)	memset(v,0,sizeof(v))
#define MP(a,b)		make_pair((a),(b))
#define ABS(a)		((a)>0?(a):-(a))
#define F			first
#define S			second

ll n, a[2][100];
 
int main(int argc, char **argv) {
	cin >> a;
	REP(i, 2) REP(j, n) cin >> a[i][j];
	ll res = 0;
	REP(i, n) {
		ll s = 0;
		REP(j, i+1) s += a[0][j];
		FOR(j, i, n+1) s += a[1][j];
		res = max(res, s);
	}
	cout << res << endl;
	return 0;
}
 

Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:28:13: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'll [2][100]' {aka 'long long int [2][100]'})
   28 |         cin >> a;
      |         ~~~ ^~ ~
      |         |      |
      |         |      ll [2][100] {aka long long int [2][100]}
      |         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:28:16: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'll (*)[100]' {aka 'long long int (*)[100]'}
   28 |         cin >> a;
      |                ^
/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:28:16: error: invalid conversion from 'll (*)[100]' {aka 'long long int (*)[100]'} to 'short int' [-fpermissive]
   28 |         cin >> a;
      |                ^
      |                |
      |                ll (*)[100] {aka long long int (*)[100]}
a.cc:28:16: error: cannot bind rvalue '(short int)((ll (*)[100])(& a))' 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:28:16: error: invalid conversion from 'll (*)[100]' {aka 'long long int (*)[100]'} to 'short unsigned int' [-fpermissive]
   28 |         cin >> a;
      |                ^
      |                |
      |                ll (*)[100] {aka long long int (*)[100]}
a.cc:28:16: error: cannot bind rvalue '(short unsigned int)((ll (*)[100])(& a))' 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:28:16: error: invalid conversion from 'll (*)[100]' {aka 'long long int (*)[100]'} to 'int' [-fpermissive]
   28 |         cin >> a;
      |                ^
      |                |
      |                ll (*)[100] {aka long long int (*)[100]}
a.cc:28:16: error: cannot bind rvalue '(int)((ll (*)[100])(& a))' 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:28:16: error: invalid conversion from 'll (*)[100]' {aka 'long long int (*)[100]'} to 'unsigned int' [-fpermissive]
   28 |         cin >> a;
      |                ^
      |                |
      |                ll (*)[100] {aka long long int (*)[100]}
a.cc:28:16: error: cannot bind rvalue '(unsigned int)((ll (*)[100])(& a))' 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:28:16: error: invalid conversion from 'll (*)[100]' {aka 'long long int (*)[100]'} to 'long int' [-fpermissive]
   28 |         cin >> a;
      |                ^
      |                |
      |                ll (*)[100] {aka long long int (*)[100]}
a.cc:28:16: error: cannot bind rvalue '(long int)((ll (*)[100])(& a))' 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:28:16: error: invalid conversion from 'll (*)[100]' {aka 'long long int (*)[100]'} to 'long unsigned int' [-fpermissive]
   28 |         cin >> a;
      |                ^
      |                |
      |                ll (*)[100] {aka long long int (*)[100]}
a.cc:28:16: error: cannot bind rvalue '(long unsigned int)((ll (*)[100])(& a))' 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:28:16: error: invalid conversion from 'll (*)[100]' {aka 'long long int (*)[100]'} to 'long long int' [-fpermissive]
   28 |         cin >> a;
      |                ^
      |                |
      |                ll (*)[100] {aka long long int (*)[100]}
a.cc:28:16: error: cannot bind rvalue '(long long int)((ll (*)[100])(& a))' 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:28:16: error: invalid conversion from 'll (*)[100]' {aka 'long long int (*)[100]'} to 'long long unsigned int' [-fpermissive]
   28 |         cin >> a;
      |                ^
      |                |
      |                ll (*)[100] {aka long long int (*)[100]}
a.cc:28:16: error: cannot bind rvalue '(long long unsigned int)((ll (*)[100])(& a))' 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:28:16: error: cannot bind non-const lvalue reference of type 'void*&' to an rvalue of type 'void*'
   28 |         cin >> a;
      |                ^
/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 'll [2][100]' {aka 'long long int [2][100]'} 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 'll [2][100]' {aka 'long long int [2][100]'} 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 'll [2][100]' {aka 'long long int [2][100]'} 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 'll [2][100]' {aka 'long long int [2][100]'} t