Compilare: user.cpp: In function ‘void dfsT(int)’: user.cpp:66:9: warning: unused variable ‘nod’ [-Wunused-variable] int nod; ^ user.cpp: In function ‘int main()’: user.cpp:127:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:132:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &b[i][j]); ^