Compilare: main.cpp: In function 'int main()': main.cpp:52:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i = 0; i < cycle.size(); ++i) { | ~~^~~~~~~~~~~~~~ main.cpp:56:17: warning: 'last_num' may be used uninitialized [-Wmaybe-uninitialized] 56 | if (nums[cycle[i] - 9].first == last_num) | ^~ main.cpp:51:13: note: 'last_num' was declared here 51 | int last_num; | ^~~~~~~~