foo.cc: In function 'void Solve()':
foo.cc:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |         for(int j=0;j < ship[i].size();++j)
      |                     ~~^~~~~~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
foo.cc:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   42 |         scanf("%d%d",&t,&k);
      |         ~~~~~^~~~~~~~~~~~~~
foo.cc:47:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   47 |             scanf("%d",&native);
      |             ~~~~~^~~~~~~~~~~~~~

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