foo.cpp:6:27: error: size of array 'blanket' is too large
 int blanket[100000][100000],n,a,b,g,k,x,y;
                           ^
foo.cpp: In function 'int main()':
foo.cpp:13:4: error: 'blanket' was not declared in this scope
    blanket[i][j]=-1;
    ^
foo.cpp:25:5: error: 'blanket' was not declared in this scope
     blanket[p][q]=i;
     ^
foo.cpp:31:14: error: 'blanket' was not declared in this scope
  printf("%d",blanket[x][y]);
              ^