Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:55:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[x].size(); ++i) ^ user.cpp: In function ‘void Dfs(int, int)’: user.cpp:80:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[x].size(); ++i) ^ user.cpp: In function ‘void apm()’: user.cpp:107:17: warning: ‘Nr’ may be used uninitialized in this function [-Wmaybe-uninitialized] Nr++; ^