foo.cc: In function 'int main()':
foo.cc:8:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
8 | for (int i = 0; i < s.size() - 1; i++)
| ~~^~~~~~~~~~~~~~
foo.cc:15:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
15 | for (int i = 0; i < s.size(); i++)
| ~~^~~~~~~~~~
foo.cc:21:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
21 | for (int i = 0; i < s.size()-1; i++)
| ~~^~~~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务