Compilare: main.cpp: In function 'int main()': main.cpp:161:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 161 | for(int i = 0; i < ll.size() - 1; i++) | ~~^~~~~~~~~~~~~~~ main.cpp:189:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 189 | for(int i = 0; i < singure.size(); i++) | ~~^~~~~~~~~~~~~~~~ main.cpp:196:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 196 | for(int i = 0; i < nepuse.size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp:200:42: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 200 | for(int i = nepuse.size(); i < singure.size(); i++) | ~~^~~~~~~~~~~~~~~~