foo.c: In function 'issaddlepoint':
foo.c:23:10: warning: variable 'min' set but not used [-Wunused-but-set-variable]
  int max,min;
          ^~~
foo.c: In function 'main':
foo.c:6:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  int m; scanf("%d",&m);
         ^~~~~~~~~~~~~~
foo.c:7:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  int n; scanf("%d",&n);
         ^~~~~~~~~~~~~~
foo.c:13:4: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%d",&a[i][j]);
    ^~~~~~~~~~~~~~~~~~~~

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