Compilare: main.cpp: In function 'int main()': main.cpp:44:37: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 44 | while(v[i-1].first.length() == lung && i-1 >= 1) | ~~~~~~~~~~~~~~~~~~~~~~^~~~~~~ main.cpp:60:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int j = 0; j<v[i].first.length(); j++) | ~^~~~~~~~~~~~~~~~~~~~ main.cpp:89:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | for(int k = 0; k<v[j].first.length(); k++) | ~^~~~~~~~~~~~~~~~~~~~ main.cpp:91:66: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | if(v[i].first[it] == v[j].first[k] && it < v[i].first.length()) | ~~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:95:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | if(it == v[i].first.length()) | ~~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:102:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 102 | if(it == v[i].first.length()) | ~~~^~~~~~~~~~~~~~~~~~~~~~