/in/foo.cc:6:1: error: expected initializer before 'bool'
 bool next_chess[maxn][maxn];
 ^~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:11:9: error: 'chess' was not declared in this scope
    cin>>chess[i][j];
         ^~~~~
/in/foo.cc:17:8: error: 'chess' was not declared in this scope
     if(chess[i][j]){
        ^~~~~
/in/foo.cc:18:15: error: 'check' was not declared in this scope
      if(check()<2||check()>3)next_chess[i][j] = 0;
               ^
/in/foo.cc:18:30: error: 'next_chess' was not declared in this scope
      if(check()<2||check()>3)next_chess[i][j] = 0;
                              ^~~~~~~~~~
/in/foo.cc:20:15: error: 'check' was not declared in this scope
      if(check()==3)next_chess[i][j] = 1;
               ^
/in/foo.cc:20:20: error: 'next_chess' was not declared in this scope
      if(check()==3)next_chess[i][j] = 1;
                    ^~~~~~~~~~
/in/foo.cc:26:5: error: 'chess' was not declared in this scope
     chess[i][j] = next_chess[i][j] ;
     ^~~~~
/in/foo.cc:26:11: error: 'i' was not declared in this scope
     chess[i][j] = next_chess[i][j] ;
           ^
/in/foo.cc:26:14: error: 'j' was not declared in this scope
     chess[i][j] = next_chess[i][j] ;
              ^
/in/foo.cc:26:19: error: 'next_chess' was not declared in this scope
     chess[i][j] = next_chess[i][j] ;
                   ^~~~~~~~~~
/in/foo.cc:30:22: error: expected ')' before '{' token
  for(int i=1;i<=N;i++{
                      ^
/in/foo.cc:32:10: error: 'next_chess' was not declared in this scope
    cout<<next_chess[i][j];
          ^~~~~~~~~~