Compilare: user.cpp: In function ‘void Dijkstra()’: user.cpp:22:13: warning: unused variable ‘root’ [-Wunused-variable] int i, lg, root, dist, ind, next; ^ user.cpp: In function ‘int main()’: user.cpp:47:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:49:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d", &x, &y, &w); ^