Compilare: main.cpp: In function 'int main()': main.cpp:82:68: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 82 | if (sol == -1 or poz[j - 'a'].size() - sol + 1 < fr[j - 'a']) | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~ main.cpp:101:50: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 101 | for (int k = sol; also and k < poz[j - 'a'].size(); k++, also--) | ~~^~~~~~~~~~~~~~~~~~~~~ main.cpp:42:9: warning: unused variable 'n' [-Wunused-variable] 42 | int n = i; | ^