Compilare: main.cpp: In function 'void dfs(long long int, long long int)': main.cpp:64:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 64 | for(int i = 0; i != g[fiu].size(); i ++) | ~~^~~~~~~~~~~~~~~~ main.cpp:76:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for(int i = 0; i != g[fiu].size(); i ++) | ~~^~~~~~~~~~~~~~~~