Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < graph[node].size ( ); i++ ){ ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int)': main.cpp:27:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for ( int i = 0; i < grapht[node].size ( ); i++ ){ ~~^~~~~~~~~~~~~~~~~~~~~~~