Compilare: main.cpp: In function 'int main()': main.cpp:56:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | while(ptr[pidx]<pos[pidx].size()&&pos[pidx][ptr[pidx]]<=currpos){ | ~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:60:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | if(ptr[pidx]<pos[pidx].size()){ | ~~~~~~~~~^~~~~~~~~~~~~~~~~ main.cpp:73:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 73 | if(res.length()!=m){ | ~~~~~~~~~~~~^~~