Compilare: main.cpp: In function 'void dfs(long long int, long long int)': main.cpp:16:18: 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] 16 | for(int i=0;i<adj[x].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp:24:22: 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] 24 | for(int i=0;i<adj[x].size();i++){ | ~^~~~~~~~~~~~~~ main.cpp:25:17: warning: unused variable 'y' [-Wunused-variable] 25 | int y=adj[x][i]; | ^