Compilare: user.cpp: In function ‘void dfs1(int)’: user.cpp:33:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod].size(); i++) ^ user.cpp: In function ‘void dfs2(int)’: user.cpp:47:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<a[nod].size(); i++) ^ user.cpp: In function ‘bool verif(int, int)’: user.cpp:63:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<a[x].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:97:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<c[i].size(); j++)//elem din componenta conexa ^ user.cpp:100:44: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int q=0; q<c[i+1].size(); q++)//elementele din componenta conexa urmatoare ^ user.cpp:109:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0; j<c[i+1].size(); j++)//elem din componenta conexa ^ user.cpp:112:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int q=0; q<c[i].size(); q++)//elementele din componenta conexa urmatoare ^ user.cpp:72:13: warning: unused variable ‘q’ [-Wunused-variable] int i,j,q,ok; ^