foo.cc: In function 'int main()':
foo.cc:8:15: 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<a.length();i++) {
| ~^~~~~~~~~~~
foo.cc:11:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
11 | for(int i=0;i<b.length();i++) {
| ~^~~~~~~~~~~
foo.cc:15:15: 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<a.length();i++) {
| ~^~~~~~~~~~~
[Hydro](https://hydro.ac)提供评测服务