foo.cc: In function 'void Next(std::string)':
foo.cc:10:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |     while (j<T.size()) {
      |            ~^~~~~~~~~
foo.cc: In function 'int KMP(std::string)':
foo.cc:20:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     while (i<s.size()) {
      |            ~^~~~~~~~~
foo.cc:28:13: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         if(j==b.size())
      |            ~^~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:45:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   45 |   if(y-x+1<b.size()) printf("0\n");
      |      ~~~~~^~~~~~~~~
foo.cc:38:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   38 |  scanf("%d%d%d",&n,&m,&q);
      |  ~~~~~^~~~~~~~~~~~~~~~~~~
foo.cc:44:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |   scanf("%d%d",&x,&y);
      |   ~~~~~^~~~~~~~~~~~~~

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