Compilare: user.cpp: In function ‘void defeu(int, int, int, int, int)’: user.cpp:21:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[cur].size(); ++i) ~~^~~~~~~~~~~~~~~ user.cpp:53:24: warning: ‘nry’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(nrx == 1 && nry == 1 && ok) ~~~~^~~~ user.cpp:53:12: warning: ‘nrx’ may be used uninitialized in this function [-Wmaybe-uninitialized] if(nrx == 1 && nry == 1 && ok) ~~~~^~~~