Compilare: main.cpp: In function 'int main()': main.cpp:22:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for (k = 0; k < hash[v].size(); k++){ | ~~^~~~~~~~~~~~~~~~ main.cpp:32:11: warning: 'nr' may be used uninitialized in this function [-Wmaybe-uninitialized] 32 | printf("%d\n",nr); | ~~~~~~^~~~~~~~~~~