Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:17:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<p[x].size();i++) { ^ user.cpp: In function ‘void dft(int)’: user.cpp:29:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<q[x].size();i++) { ^ user.cpp: In function ‘void dfsciclu(int, int)’: user.cpp:41:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<p[x].size();i++) { ^ user.cpp: In function ‘int main()’: user.cpp:103:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<l[j].size();i++) ^ user.cpp:79:13: warning: unused variable ‘e’ [-Wunused-variable] int i,j,e,a,b; ^