Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:26: 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:30:26: 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:42:26: 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:94:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0;i<l[j].size();i++) ^