Compilare: user.cpp: In function ‘void ReadInput()’: user.cpp:29:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:31:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int u, v; scanf("%d%d", &u, &v); ^ user.cpp: In function ‘void GetEdgeNumbers()’: user.cpp:44:58: warning: array subscript is below array bounds [-Warray-bounds] edgeNumber[i] = edgeNumber[i ^ (1 << bit[bits - 1])]; ^