Compilare: main.cpp: In function 'void adauga(int)': main.cpp:31:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 31 | for(int j = 0; j < v[i].size(); j ++) | ~~^~~~~~~~~~~~~ main.cpp: In function 'void sterge(int)': main.cpp:45:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | for(int j = 0; j < v[i].size(); j ++) | ~~^~~~~~~~~~~~~