foo.cc: In function 'int toInt(std::string)':
foo.cc:24:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |  while (i < t.size())
      |         ~~^~~~~~~~~~
foo.cc: In function 'void getne(std::string, int*)':
foo.cc:63:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |  while (i < p.size())
      |         ~~^~~~~~~~~~
foo.cc: In function 'll kmp(std::string, std::string, int*)':
foo.cc:81:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   81 |   while (i < len && post < p.size() && s[i] == p[post]) i++, post++;
      |                     ~~~~~^~~~~~~~~~
foo.cc:83:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   83 |   if (post == p.size()) sum++;
      |       ~~~~~^~~~~~~~~~~
foo.cc: At global scope:
foo.cc:105:20: warning: suggest parentheses around '+' inside '<<' [-Wparentheses]
  105 | const int N = 1<<16+7;
      |                  ~~^~
foo.cc: In function 'void deal()':
foo.cc:121:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  121 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
foo.cc:125:9: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  125 |    scanf("%lld", *(w + i) + j);
      |    ~~~~~^~~~~~~~~~~~~~~~~~~~~~

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