foo.cc: In function 'int main()':
foo.cc:24:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   24 |             scanf("%d", &s[i]);
      |             ~~~~~^~~~~~~~~~~~~
foo.cc:27:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   27 |             scanf("%d%d%d", &u, &v, &w);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~~~~
foo.cc:31:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   31 |         scanf("%d", &q);
      |         ~~~~~^~~~~~~~~~
foo.cc:35:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   35 |             scanf("%d%d", &u, &v);
      |             ~~~~~^~~~~~~~~~~~~~~~
foo.cc:25:27: warning: 'm' may be used uninitialized in this function [-Wmaybe-uninitialized]
   25 |         for (int i = 0; i < m; i++)
      |                         ~~^~~

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