foo.cc: In function 'int main()':
foo.cc:13:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
13 | for(int i = 0;i < s.size();i++)if(s[i]>='A'&&s[i]<='Z')s[i]+=32;
| ~~^~~~~~~~~~
foo.cc:14:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
14 | for(int i = 1;i < s.size();i++)
| ~~^~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务