Compilare: user.cpp: In function ‘void dfs(int, int)’: user.cpp:17:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();++i) ~^~~~~~~~~~~~~~ user.cpp: In function ‘void dfs1(int)’: user.cpp:37:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<arb[nod].size();++i) ~^~~~~~~~~~~~~~~~ user.cpp: In function ‘void dfs2(int, int, long long int, long long int)’: user.cpp:56:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<arb[nod].size();++i) ~^~~~~~~~~~~~~~~~ user.cpp:62:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<arb[nod].size();++i) ~^~~~~~~~~~~~~~~~ user.cpp: In function ‘int main()’: user.cpp:104:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<culoare[i-1].size();++j) ~^~~~~~~~~~~~~~~~~~~~ user.cpp:107:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j<muchii[i].size();++j) ~^~~~~~~~~~~~~~~~~