Compilare: main.c: In function 'op_remove': main.c:35:8: warning: unused variable 'rem' [-Wunused-variable] node *rem = NULL; ^~~ main.c: At top level: main.c:68:6: warning: return type of 'main' is not 'int' [-Wmain] void main() { ^~~~ main.c: In function 'main': main.c:70:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.in", "r", stdin); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:71:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("hashuri.out", "w", stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:80:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &i); ^~~~~~~~~~~~~~~ main.c:83:3: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%u %u", &o, &n); ^~~~~~~~~~~~~~~~~~~~~~