foo.c: In function 'main':
foo.c:5:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable : 4996)
 
foo.c:6:16: warning: unused variable 'b' [-Wunused-variable]
  int n,  i, m, b, flg = 0;
                ^
foo.c:7:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ^~~~~~~~~~~~~~~

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