foo.cc: In function 'int main()':
foo.cc:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |  scanf("%d", &m);
      |  ~~~~~^~~~~~~~~~
foo.cc:39:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   39 |  for (int i = 1; i <= m; ++i) scanf("%d", &A[i]);
      |                               ~~~~~^~~~~~~~~~~~~
foo.cc:40:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   40 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
foo.cc:41:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   41 |  for (int i = 1; i <= n; ++i) scanf("%d", &B[i]);
      |                               ~~~~~^~~~~~~~~~~~~

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