Compilare: main.cpp:16:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type] 16 | main() | ^~~~ main.cpp: In function 'int main()': main.cpp:23:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i=1;i<b.size();++i) | ~^~~~~~~~~ main.cpp:29:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i=1;i<a.size();++i) | ~^~~~~~~~~ main.cpp:36:18: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for(int i=2;i<a.size();++i) | ~^~~~~~~~~ main.cpp:37:22: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | for(int j=2;j<b.size();++j) | ~^~~~~~~~~ main.cpp:65:9: warning: unused variable 'mx' [-Wunused-variable] 65 | int mx = 0 ,ans = 0; | ^~ main.cpp:65:17: warning: unused variable 'ans' [-Wunused-variable] 65 | int mx = 0 ,ans = 0; | ^~~