foo.cc:3: warning: ignoring #pragma warning  [-Wunknown-pragmas]
    3 | #pragma warning(disable:4996)
      | 
foo.cc: In function 'int main()':
foo.cc:7:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    7 |  scanf("%d", &m);
      |  ~~~~~^~~~~~~~~~

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