Compilare: main.cpp: In function 'bool exista(int)': main.cpp:22:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i = 0; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:26:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | if(it >= pz[c - 'a'].size()) return 0; | ~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'bool exista_mai_brut(int)': main.cpp:34:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 34 | for(int i = 0; i < s.size(); i++){ | ~~^~~~~~~~~~ main.cpp:37:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 37 | while(it < v.size() && v[it] != c) it++; | ~~~^~~~~~~~~~ main.cpp:38:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | if(it == v.size()) return 0; | ~~~^~~~~~~~~~~