Compilare: user.cpp: In function ‘void dfs1(int, int, long long int)’: user.cpp:72:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0;i < edge[node].size();i++){ ^ user.cpp:89:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(id != edge[node].size()){ ^ user.cpp:95:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0;i < edge[node].size();i++){ ^ user.cpp:98:13: warning: unused variable ‘c’ [-Wunused-variable] int c = edge[node][i].second; ^ user.cpp:107:13: warning: unused variable ‘c’ [-Wunused-variable] int c = edge[node][i].second; ^