Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:24:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[x].size();i++) ^ user.cpp: In function ‘void dfst(int)’: user.cpp:34:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<vt[x].size();i++) ^ user.cpp: In function ‘void solve_ctc()’: user.cpp:44:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<l[comp].size();i++) ^ user.cpp:47:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<vt[nod].size();j++) ^ user.cpp:89:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=l[comp].size();i++) ^