lozinke.cpp: In function 'void check(std::string, std::string)':
lozinke.cpp:12:20: 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]
12 | for(int i = 0;i<a.size();i++)
| ~^~~~~~~~~
lozinke.cpp:19:32: 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]
19 | while(a[x]==b[j]&&x<a.size()&&j<sizeofb)
| ~^~~~~~~~~
lozinke.cpp: At global scope:
lozinke.cpp:34:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
34 | main()
| ^~~~