Compilare: user.cpp: In function ‘void DFS(int, int)’: user.cpp:56:13: warning: unused variable ‘sons’ [-Wunused-variable] int sons = 0; ^ user.cpp: In function ‘void ReadInput()’: user.cpp:26:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &P); ^ user.cpp:28:55: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int u, v, dist; scanf("%d%d%d", &u, &v, &dist); ^