Compilare: main.cpp: In function 'int main()': main.cpp:90:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 90 | for(int i = 0; i < ctc.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:126:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 126 | for(int i = 0; i < af.size(); i++) | ~~^~~~~~~~~~~ main.cpp:129:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 129 | if(ct != af.size()) | ~~~^~~~~~~~~~~~