Language: C++


#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <cmath>
#include <stack>
#include <queue>
#include <cctype>
#include <complex>
#include <vector>
#include <set>
#include <map>
#include <algorithm>
#include <functional>
#include <cassert>
#include <iomanip>

using namespace std;

#define pb push_back
typedef long long ll;
typedef complex<int> P;
typedef pair<int, int> Pii;


int a[100][100];
P dd[] = {P(1,0), P(1,1), P(0,1), P(-1,0), P(-1,-1), P(0,-1)};


int dfs(P p, int k){
	if(a[p.real()+50][p.imag()+50] == -2) return 0;
	if(k <= a[p.real()+50][p.imag()+50]) return 0;

	int res = 0;
	if(a[p.real()+50][p.imag()+50] == -1) res++;
	a[p.real()+50][p.imag()+50] = k;
	for(int i=0;i<6;i++){
		res += dfs(p+dd[i], k-1);
	}
	return res;
}

bool solve(){
	int t, n;
	cin>> t>> n;
	if(t==0 && n==0) return false;
	
	for(int i=0;i<100;i<++) for(int j=0;j<100;j++) a[i][j] = -1;
	for(int i=0;i<n;i++){
		int x, y;
		cin>> x>> y;
		a[x+50][y+50] = -2;
	}
	P p;
	cin>> p.real()>> p.imag();
	int ans = dfs(p, t);
	cout<< ans<< endl;
	
	return true;
}

int main(){
	cout.setf(ios::fixed);
	cout.precision(10);
	
	while(solve());

	return 0;
}

 

Compiler output:
a.cc: In function 'bool solve()':
a.cc:49:31: error: expected primary-expression before ')' token
   49 |         for(int i=0;i<100;i<++) for(int j=0;j<100;j++) a[i][j] = -1;
      |                               ^
a.cc:56:12: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'int')
   56 |         cin>> p.real()>> p.imag();
      |         ~~~^~ ~~~~~~~~
      |         |           |
      |         |           int
      |         std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/iostream:42,
                 from a.cc:2:
/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:56:21: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: cannot bind non-const lvalue reference of type 'short int&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: cannot bind non-const lvalue reference of type 'short unsigned int&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: cannot bind non-const lvalue reference of type 'int&' to an rvalue of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: cannot bind non-const lvalue reference of type 'unsigned int&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: cannot bind non-const lvalue reference of type 'long int&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: cannot bind non-const lvalue reference of type 'long unsigned int&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: cannot bind non-const lvalue reference of type 'long long int&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: cannot bind non-const lvalue reference of type 'long long unsigned int&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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>]' (near match)
  219 |       operator>>(float& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:219:7: note:   conversion of argument 1 would be ill-formed:
a.cc:56:21: error: cannot bind non-const lvalue reference of type 'float&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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>]' (near match)
  223 |       operator>>(double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:223:7: note:   conversion of argument 1 would be ill-formed:
a.cc:56:21: error: cannot bind non-const lvalue reference of type 'double&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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>]' (near match)
  227 |       operator>>(long double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:227:7: note:   conversion of argument 1 would be ill-formed:
a.cc:56:21: error: cannot bind non-const lvalue reference of type 'long double&' to a value of type 'int'
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
/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:56:21: error: invalid conversion from 'int' to 'void*' [-fpermissive]
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
      |                     |
      |                     int
a.cc:56:21: error: cannot bind rvalue '(void*)((long int)p.std::complex<int>::real())' to 'void*&'
/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>]' (near match)
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:7: note:   conversion of argument 1 would be ill-formed:
a.cc:56:21: error: invalid conversion from 'int' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
      |                     |
      |                     int
/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 = std::char_traits<char>; __istream_type = std::basic_istream<char>; __ios_type = std::basic_ios<char>]' (near match)
  126 |       operator>>(__ios_type& (*__pf)(__ios_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:126:7: note:   conversion of argument 1 would be ill-formed:
a.cc:56:21: error: invalid conversion from 'int' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'} [-fpermissive]
   56 |         cin>> p.real()>> p.imag();
      |               ~~~~~~^~
      |                     |