Compilare: main.cpp: In function 'int main()': main.cpp:49:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int i = 0; i < ctc.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for(int i = 0; i < ctc.size(); i++) { | ~~^~~~~~~~~~~~ main.cpp:53:26: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 53 | if(ctc[i].size() == maxx) { | ~~~~~~~~~~~~~~^~~~~~~