Compilare: user.cpp: In function ‘void euler(int)’: user.cpp:63:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); ++i) { ^ user.cpp: In function ‘int main()’: user.cpp:149:27: warning: ‘yi’ may be used uninitialized in this function [-Wmaybe-uninitialized] euler(graf[xi][yi]); ^ user.cpp:149:27: warning: ‘xi’ may be used uninitialized in this function [-Wmaybe-uninitialized]