Compilare: main.cpp: In function 'int main()': main.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for(int i=0; i<drum.size(); i++) { | ~^~~~~~~~~~~~ main.cpp:60:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 60 | for(int i=0; i<drumuri.size(); i++) { | ~^~~~~~~~~~~~~~~ main.cpp:62:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for(int j=0; j<drumuri[i].size(); j++) { | ~^~~~~~~~~~~~~~~~~~