foo.cc: In function 'int main()':
foo.cc:88:12: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   88 |   printf("%d ",v.size());
      |           ~^   ~~~~~~~~
      |            |         |
      |            int       std::vector<int>::size_type {aka long unsigned int}
      |           %ld
foo.cc:89:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |   for(i=0;i<v.size();i++){
      |           ~^~~~~~~~~
foo.cc:64:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   64 |  scanf("%d",&T);
      |  ~~~~~^~~~~~~~~
foo.cc:68:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   68 |    scanf("%s",ch);
      |    ~~~~~^~~~~~~~~

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