Compilare: main.cpp: In function 'std::vector<int> reindexare(const std::vector<int>&)': main.cpp:20:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for (int i = 0; i < v.size(); i++) | ~~^~~~~~~~~~ main.cpp:26:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (int i = 0; i < copy_v.size(); i++) { | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'std::vector<Group> buildGroups(const std::vector<int>&)': main.cpp:88:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 88 | for (int i = 0; i < v.size(); i++) { | ~~^~~~~~~~~~