Compilare: main.cpp: In function 'ull solve(const std::vector<int>&, int)': main.cpp:12:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 12 | for(int i = 0;i < v.size();++i) | ~~^~~~~~~~~~ main.cpp:15:33: warning: comparison of integer expressions of different signedness: 'std::unordered_map<int, int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 15 | while(mp.size() > nr) | ~~~~~~~~~~^~~~