Compilare: main.cpp: In function 'bool check_shift(const std::vector<int>&, const std::vector<int>&)': main.cpp:11:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 11 | for(int i = 1 ; i < winner.size(); ++i) { | ~~^~~~~~~~~~~~~~~ main.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i = 1; i < winner.size(); ++i) { | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'bool check_swap(const std::vector<int>&, const std::vector<int>&)': main.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int i = 1; i< winner.size(); ++i) { | ~^~~~~~~~~~~~~~~ main.cpp:31:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for (int i = 1; i< winner.size(); ++i) { | ~^~~~~~~~~~~~~~~