Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:18:24: 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:63:17: warning: 'sol' may be used uninitialized in this function [-Wmaybe-uninitialized] g << sol << '\n'; ^~~~