Compilare: main.cpp: In function 'int main()': main.cpp:62:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int i = 0; i < cnt[val[1].idx].size(); i ++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:91:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for(int q = 1; q < cnt[val[j].idx].size(); q ++) | ~~^~~~~~~~~~~~~~~~~~~~~~~~