Compilare: main.cpp: In function 'int main()': main.cpp:41:28: warning: comparison of integer expressions of different signedness: '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if (val[j] != n - (val.size() - j) + 1) main.cpp:52:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (j = poz + 2; j < val.size(); j++) | ~~^~~~~~~~~~~~ main.cpp:25:9: warning: unused variable 'mask' [-Wunused-variable] 25 | int mask = 0; | ^~~~