Compilare: user.c: In function ‘main’: user.c:49:9: warning: format ‘%d’ expects argument of type ‘int’, but argument 4 has type ‘u64’ [-Wformat=] fprintf(fout, "%d %d\n", p, cost(st, dr, p)); ^ user.c:34:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.c:36:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &v[i]); ^ user.c:47:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &st, &dr); ^