Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:25:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < graph[node].size(); i++ ){ ~~^~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:22: warning: 'origin' may be used uninitialized in this function [-Wmaybe-uninitialized] dfs ( origin, 0 ); ^