Compilare: user.cpp: In function ‘void build_tree()’: user.cpp:42:27: warning: unused variable ‘x’ [-Wunused-variable] long int counter = 1, x; ^ user.cpp: In function ‘void changeAutocar(int, int)’: user.cpp:86:54: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 4 has type ‘int’ [-Wformat=] fprintf(fout, "Move %ld %ld %ld\n", *it, a, b); ^ user.cpp:86:54: warning: format ‘%ld’ expects argument of type ‘long int’, but argument 5 has type ‘int’ [-Wformat=] user.cpp: In function ‘int main()’: user.cpp:137:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ user.cpp:141:38: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%ld%ld", &n, &m); ^ user.cpp:154:54: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%ld%ld%ld",&x, &y, &_path.c); ^