Compilare: user.cpp: In function ‘int df(int, int)’: user.cpp:43:33: warning: ‘nmin’ may be used uninitialized in this function [-Wmaybe-uninitialized] if (from_node != -1 && nmin != from_node) ^ user.cpp:26:44: warning: ‘cmin2’ may be used uninitialized in this function [-Wmaybe-uninitialized] int cmin = numeric_limits<int>::max(), cmin2, nmin, pcost = 0; ^