Compilare: user.cpp: In function ‘void Bfs()’: user.cpp:94:13: warning: unused variable ‘S’ [-Wunused-variable] int S = id[s]; ^ user.cpp: In function ‘int main()’: user.cpp:128:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &T); ^ user.cpp:131:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:137:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^