Compilare: main.cpp: In function 'int main()': main.cpp:57:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for (int i = 0; i < sol.size() - 1; i++) | ~~^~~~~~~~~~~~~~~~ main.cpp:64:30: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | while (sol[sol.size() - 1] > sol.size() - 1) main.cpp:77:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 77 | for (int i = 0; i < sol.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:49:16: warning: unused variable 'nr' [-Wunused-variable] 49 | long long m, nr = 0;; | ^~