foo.c: In function 'main':
foo.c:9:21: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'int' [-Wformat=]
    9 |             scanf("%d",a[i][j]);
      |                    ~^  ~~~~~~~
      |                     |      |
      |                     int *  int
foo.c:6:5: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    6 |     scanf("%d%d",&n,&m);
      |     ^~~~~~~~~~~~~~~~~~~
foo.c:9:13: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    9 |             scanf("%d",a[i][j]);
      |             ^~~~~~~~~~~~~~~~~~~

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