Language: C++

#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <set>
#include <cstring>
#include <cmath>
#include <queue>
using namespace std;

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define REP(i, k, n) for (int i = (int)(k); i < (int)(n); i++)
#define rrep(i, n) for (int i = (int)(n)-1; i >= 0; i--)
#define rREP(i, k, n) for (int i = (int)(n)-1; i >= k; i--)

#define debug(x) cerr<<#x<<": "<<x<<endl;

#define fi first
#define se second

#define vi vector<int>
#define pb push_back
#define mp make_pair

#define pcnt __builtin_popcount

typedef long long ll;

const int MOD = (int)1e9 + 7;
const double EPS = 1e-9;
const int dx[6] = {1,-1,1,0,-1,0};
const int dy[6] = {1,-1,0,1,0,-1};

int main(){
    int a,b;
    while(cin >> a >> b,a){
        rep(i,200)rep(j,200)ban[i][j]=bfs[i][j]=0;
        rep(i,b){
            int x,y;
            cin >> x >> y;
            x+=100;
            y+=100;
            ban[y][x]=1;
        }
        int sx,sy;
        cin >> sx >> sy;
        sx+=100;
        sy+=100;
        queue qy;
        queue qx;
        qx.push(sx);
        qy.push(sy);
        bfs[sy][sx] = a+1;
        while(q.size()){
            int y = qy.front();
            int x = qx.front();
            qx.pop();qy.pop();
            if(bfs[y][x] == 1) break;
            rep(i,6){
                int nx = x+dx[i];
                int ny = y+dy[i];
                if(!bfs[ny][nx]&&!ban[ny][nx]){
                    bfs[ny][nx] = bfs[y][x]-1;
                    qx.push(nx);
                    qy.push(ny);
                }
            }
        }
        int ret = 0;
        rep(i,200)rep(j,200)if(bfs[i][j])ret++;
        cout << ret << endl;
    }
}



Compiler output:
a.cc: In function 'int main()':
a.cc:38:29: error: 'ban' was not declared in this scope; did you mean 'tan'?
   38 |         rep(i,200)rep(j,200)ban[i][j]=bfs[i][j]=0;
      |                             ^~~
      |                             tan
a.cc:38:39: error: 'bfs' was not declared in this scope; did you mean 'ffs'?
   38 |         rep(i,200)rep(j,200)ban[i][j]=bfs[i][j]=0;
      |                                       ^~~
      |                                       ffs
a.cc:44:13: error: 'ban' was not declared in this scope; did you mean 'tan'?
   44 |             ban[y][x]=1;
      |             ^~~
      |             tan
a.cc:50:15: error: class template argument deduction failed:
   50 |         queue qy;
      |               ^~
a.cc:50:15: error: no matching function for call to 'queue()'
In file included from /usr/include/c++/14/queue:66,
                 from a.cc:9:
/usr/include/c++/14/bits/stl_queue.h:195:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(std::queue<_Tp, _Seq>&&, const _Alloc&)-> std::queue<_Tp, _Sequence>'
  195 |         queue(queue&& __q, const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:195:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:191:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(const std::queue<_Tp, _Seq>&, const _Alloc&)-> std::queue<_Tp, _Sequence>'
  191 |         queue(const queue& __q, const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:191:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:187:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(_Sequence&&, const _Alloc&)-> std::queue<_Tp, _Sequence>'
  187 |         queue(_Sequence&& __c, const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:187:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:183:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(const _Sequence&, const _Alloc&)-> std::queue<_Tp, _Sequence>'
  183 |         queue(const _Sequence& __c, const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:183:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:179:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(const _Alloc&)-> std::queue<_Tp, _Sequence>'
  179 |         queue(const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:179:9: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:174:7: note: candidate: 'template<class _Tp, class _Sequence> queue(_Sequence&&)-> std::queue<_Tp, _Sequence>'
  174 |       queue(_Sequence&& __c)
      |       ^~~~~
/usr/include/c++/14/bits/stl_queue.h:174:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:170:7: note: candidate: 'template<class _Tp, class _Sequence> queue(const _Sequence&)-> std::queue<_Tp, _Sequence>'
  170 |       queue(const _Sequence& __c)
      |       ^~~~~
/usr/include/c++/14/bits/stl_queue.h:170:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:166:9: note: candidate: 'template<class _Tp, class _Sequence, class _Seq, class _Requires> queue()-> std::queue<_Tp, _Sequence>'
  166 |         queue()
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:166:9: note:   template argument deduction/substitution failed:
a.cc:50:15: note:   couldn't deduce template parameter '_Tp'
   50 |         queue qy;
      |               ^~
/usr/include/c++/14/bits/stl_queue.h:96:11: note: candidate: 'template<class _Tp, class _Sequence> queue(std::queue<_Tp, _Sequence>)-> std::queue<_Tp, _Sequence>'
   96 |     class queue
      |           ^~~~~
/usr/include/c++/14/bits/stl_queue.h:96:11: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:344:5: note: candidate: 'template<class _Container, class _Allocator, class> std::queue(_Container, _Allocator)-> queue<typename _Container::value_type, _Container>'
  344 |     queue(_Container, _Allocator)
      |     ^~~~~
/usr/include/c++/14/bits/stl_queue.h:344:5: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:340:5: note: candidate: 'template<class _Container, class> std::queue(_Container)-> queue<typename _Container::value_type, _Container>'
  340 |     queue(_Container) -> queue<typename _Container::value_type, _Container>;
      |     ^~~~~
/usr/include/c++/14/bits/stl_queue.h:340:5: note:   candidate expects 1 argument, 0 provided
a.cc:51:15: error: class template argument deduction failed:
   51 |         queue qx;
      |               ^~
a.cc:51:15: error: no matching function for call to 'queue()'
/usr/include/c++/14/bits/stl_queue.h:195:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(std::queue<_Tp, _Seq>&&, const _Alloc&)-> std::queue<_Tp, _Sequence>'
  195 |         queue(queue&& __q, const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:195:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:191:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(const std::queue<_Tp, _Seq>&, const _Alloc&)-> std::queue<_Tp, _Sequence>'
  191 |         queue(const queue& __q, const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:191:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:187:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(_Sequence&&, const _Alloc&)-> std::queue<_Tp, _Sequence>'
  187 |         queue(_Sequence&& __c, const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:187:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:183:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(const _Sequence&, const _Alloc&)-> std::queue<_Tp, _Sequence>'
  183 |         queue(const _Sequence& __c, const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:183:9: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:179:9: note: candidate: 'template<class _Tp, class _Sequence, class _Alloc, class _Requires> queue(const _Alloc&)-> std::queue<_Tp, _Sequence>'
  179 |         queue(const _Alloc& __a)
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:179:9: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:174:7: note: candidate: 'template<class _Tp, class _Sequence> queue(_Sequence&&)-> std::queue<_Tp, _Sequence>'
  174 |       queue(_Sequence&& __c)
      |       ^~~~~
/usr/include/c++/14/bits/stl_queue.h:174:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:170:7: note: candidate: 'template<class _Tp, class _Sequence> queue(const _Sequence&)-> std::queue<_Tp, _Sequence>'
  170 |       queue(const _Sequence& __c)
      |       ^~~~~
/usr/include/c++/14/bits/stl_queue.h:170:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:166:9: note: candidate: 'template<class _Tp, class _Sequence, class _Seq, class _Requires> queue()-> std::queue<_Tp, _Sequence>'
  166 |         queue()
      |         ^~~~~
/usr/include/c++/14/bits/stl_queue.h:166:9: note:   template argument deduction/substitution failed:
a.cc:51:15: note:   couldn't deduce template parameter '_Tp'
   51 |         queue qx;
      |               ^~
/usr/include/c++/14/bits/stl_queue.h:96:11: note: candidate: 'template<class _Tp, class _Sequence> queue(std::queue<_Tp, _Sequence>)-> std::queue<_Tp, _Sequence>'
   96 |     class queue
      |           ^~~~~
/usr/include/c++/14/bits/stl_queue.h:96:11: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/stl_queue.h:344:5: note: candidate: 'template<class _Container, class _Allocator, class> std::queue(_Container, _Allocator)-> queue<typename _Container::value_type, _Container>'
  344 |     queue(_Container, _Allocator)
      |     ^~~~~
/usr/include/c++/14/bits/stl_queue.h:344:5: note:   candidate expects 2 arguments, 0 provided
/usr/include/c++/14/bits/stl_queue.h:340:5: note: candidate: 'template<class _Container, class> std::queue(_Container)-> queue<typename _Container::value_type, _Container>'
  340 |     queue(_Container) -> queue<typename _Container::value_type, _Container>;
      |     ^~~~~
/usr/include/c++/14/bits/stl_queue.h:340:5: note:   candidate expects 1 argument, 0 provided
a.cc:54:9: error: 'bfs' was not declared in this scope; did you mean 'ffs'?
   54 |         bfs[sy][sx] = a+1;
      |         ^~~
      |         ffs
a.cc:55:15: error: 'q' was not declared in this scope
   55 |         while(q.size()){
      |               ^
a.cc:63:35: error: 'ban' was not declared in this scope; did you mean 'tan'?
   63 |                 if(!bfs[ny][nx]&&!ban[ny][nx]){
      |                                   ^~~
      |                                   tan