foo.cc: In function 'int zr(int*, int, int, int, int)':
foo.cc:5:18: error: invalid types 'int[int]' for array subscript
    5 |         if (a1[x][y]==1) return 0;
      |                  ^
foo.cc: In function 'int zx(int*, int, int, int, int)':
foo.cc:23:18: error: invalid types 'int[int]' for array subscript
   23 |         if (a1[x][y]==1) return -1;
      |                  ^
foo.cc:26:18: error: invalid types 'int[int]' for array subscript
   26 |         if (a1[x][y]==2) s++;
      |                  ^
foo.cc: In function 'int main()':
foo.cc:49:18: error: cannot convert 'int (*)[m]' to 'int*'
   49 |         int s=zx(a,n-1,m-1,n,m)
      |                  ^
      |                  |
      |                  int (*)[m]
foo.cc:21:12: note:   initializing argument 1 of 'int zx(int*, int, int, int, int)'
   21 | int zx(int a1[],int x,int y,int n,int m) {
      |        ~~~~^~~~
foo.cc:51:29: error: 't' was not declared in this scope
   51 |         cout << s << " " << t << endl;
      |                             ^

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