Compilare: main.cpp: In function 'int main()': main.cpp:54:19: 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] 54 | if(poz==s.size()-1 && viz[x][y]==0) | ~~~^~~~~~~~~~~~ main.cpp:75:19: 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] 75 | if(poz<s.size()-1 && !(tx==x && ty==y)) | ~~~^~~~~~~~~~~