Compilare: main.cpp: In function 'int main()': main.cpp:89:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 89 | for (j = 0; j<af[dr].size(); j++) | ~^~~~~~~~~~~~~~ main.cpp:92:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for (j = 0; j<af[dr-1].size(); j++) | ~^~~~~~~~~~~~~~~~