Compilare: main.cpp: In function 'bool exista(int, int)': main.cpp:13:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for(int i=0;i<V[poz].size() && !da;++i) | ~^~~~~~~~~~~~~~