Compilare: main.cpp: In function 'bool check(std::string, int, int)': main.cpp:20:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | if(poz==s.size()) | ~~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:54:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(int j=0;j<=s.size();j++) | ~^~~~~~~~~~