foo.cc:3:8: error: expected initializer before ‘.’ token
    3 | int n,p.t=2000;
      |        ^
foo.cc: In function ‘int main()’:
foo.cc:10:14: error: ‘t’ was not declared in this scope; did you mean ‘tm’?
   10 |         f[0][t].x=true;
      |              ^
      |              tm
foo.cc:12:22: error: ‘p’ was not declared in this scope
   12 |                 cin>>p;
      |                      ^