Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:23:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[node].size();++i) ^ user.cpp: In function ‘void dfs(int, long long int, long long int&)’: user.cpp:38:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[node].size();++i) ^ user.cpp: In function ‘void bfs(int, long long int&)’: user.cpp:53:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<g[node].size();++i) ^