/in/foo.c: In function 'main':
/in/foo.c:9:8: warning: too many arguments for format [-Wformat-extra-args]
  scanf("%d ", &n, &k);
        ^~~~~
/in/foo.c:19:11: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
   scanf("%d", A[i][j]);
           ^
/in/foo.c:24:12: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
    scanf("%d", A[i][j]);
            ^